21080880

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1$

素因数の和:128

約数の個数: 240

約数和(自身を含む): 78923520

約数和(自身を除く): 57842640

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 19, 20, 23, 24, 30, 36, 38, 40, 45, 46, 48, 57, 60, 67, 69, 72, 76, 80, 90, 92, 95, 114, 115, 120, 134, 138, 144, 152, 171, 180, 184, 190, 201, 207, 228, 230, 240, 268, 276, 285, 304, 335, 342, 345, 360, 368, 380, 402, 414, 437, 456, 460, 536, 552, 570, 603, 670, 684, 690, 720, 760, 804, 828, 855, 874, 912, 920, 1005, 1035, 1072, 1104, 1140, 1206, 1273, 1311, 1340, 1368, 1380, 1520, 1541, 1608, 1656, 1710, 1748, 1840, 2010, 2070, 2185, 2280, 2412, 2546, 2622, 2680, 2736, 2760, 3015, 3082, 3216, 3312, 3420, 3496, 3819, 3933, 4020, 4140, 4370, 4560, 4623, 4824, 5092, 5244, 5360, 5520, 6030, 6164, 6365, 6555, 6840, 6992, 7638, 7705, 7866, 8040, 8280, 8740, 9246, 9648, 10184, 10488, 11457, 12060, 12328, 12730, 13110, 13680, 13869, 15276, 15410, 15732, 16080, 16560, 17480, 18492, 19095, 19665, 20368, 20976, 22914, 23115, 24120, 24656, 25460, 26220, 27738, 29279, 30552, 30820, 31464, 34960, 36984, 38190, 39330, 45828, 46230, 48240, 50920, 52440, 55476, 57285, 58558, 61104, 61640, 62928, 69345, 73968, 76380, 78660, 87837, 91656, 92460, 101840, 104880, 110952, 114570, 117116, 123280, 138690, 146395, 152760, 157320, 175674, 183312, 184920, 221904, 229140, 234232, 263511, 277380, 292790, 305520, 314640, 351348, 369840, 439185, 458280, 468464, 527022, 554760, 585580, 702696, 878370, 916560, 1054044, 1109520, 1171160, 1317555, 1405392, 1756740, 2108088, 2342320, 2635110, 3513480, 4216176, 5270220, 7026960, 10540440, 21080880]

約数ペア:

[(1, 21080880), (2, 10540440), (3, 7026960), (4, 5270220), (5, 4216176), (6, 3513480), (8, 2635110), (9, 2342320), (10, 2108088), (12, 1756740), (15, 1405392), (16, 1317555), (18, 1171160), (19, 1109520), (20, 1054044), (23, 916560), (24, 878370), (30, 702696), (36, 585580), (38, 554760), (40, 527022), (45, 468464), (46, 458280), (48, 439185), (57, 369840), (60, 351348), (67, 314640), (69, 305520), (72, 292790), (76, 277380), (80, 263511), (90, 234232), (92, 229140), (95, 221904), (114, 184920), (115, 183312), (120, 175674), (134, 157320), (138, 152760), (144, 146395), (152, 138690), (171, 123280), (180, 117116), (184, 114570), (190, 110952), (201, 104880), (207, 101840), (228, 92460), (230, 91656), (240, 87837), (268, 78660), (276, 76380), (285, 73968), (304, 69345), (335, 62928), (342, 61640), (345, 61104), (360, 58558), (368, 57285), (380, 55476), (402, 52440), (414, 50920), (437, 48240), (456, 46230), (460, 45828), (536, 39330), (552, 38190), (570, 36984), (603, 34960), (670, 31464), (684, 30820), (690, 30552), (720, 29279), (760, 27738), (804, 26220), (828, 25460), (855, 24656), (874, 24120), (912, 23115), (920, 22914), (1005, 20976), (1035, 20368), (1072, 19665), (1104, 19095), (1140, 18492), (1206, 17480), (1273, 16560), (1311, 16080), (1340, 15732), (1368, 15410), (1380, 15276), (1520, 13869), (1541, 13680), (1608, 13110), (1656, 12730), (1710, 12328), (1748, 12060), (1840, 11457), (2010, 10488), (2070, 10184), (2185, 9648), (2280, 9246), (2412, 8740), (2546, 8280), (2622, 8040), (2680, 7866), (2736, 7705), (2760, 7638), (3015, 6992), (3082, 6840), (3216, 6555), (3312, 6365), (3420, 6164), (3496, 6030), (3819, 5520), (3933, 5360), (4020, 5244), (4140, 5092), (4370, 4824), (4560, 4623)]