640860120

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31231}}^1$

素因数の和:31270

約数の個数: 128

約数和(自身を含む): 2248704000

約数和(自身を除く): 1607843880

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 19, 20, 24, 27, 30, 36, 38, 40, 45, 54, 57, 60, 72, 76, 90, 95, 108, 114, 120, 135, 152, 171, 180, 190, 216, 228, 270, 285, 342, 360, 380, 456, 513, 540, 570, 684, 760, 855, 1026, 1080, 1140, 1368, 1710, 2052, 2280, 2565, 3420, 4104, 5130, 6840, 10260, 20520, 31231, 62462, 93693, 124924, 156155, 187386, 249848, 281079, 312310, 374772, 468465, 562158, 593389, 624620, 749544, 843237, 936930, 1124316, 1186778, 1249240, 1405395, 1686474, 1780167, 1873860, 2248632, 2373556, 2810790, 2966945, 3372948, 3560334, 3747720, 4216185, 4747112, 5340501, 5621580, 5933890, 6745896, 7120668, 8432370, 8900835, 10681002, 11243160, 11867780, 14241336, 16021503, 16864740, 17801670, 21362004, 23735560, 26702505, 32043006, 33729480, 35603340, 42724008, 53405010, 64086012, 71206680, 80107515, 106810020, 128172024, 160215030, 213620040, 320430060, 640860120]

約数ペア:

[(1, 640860120), (2, 320430060), (3, 213620040), (4, 160215030), (5, 128172024), (6, 106810020), (8, 80107515), (9, 71206680), (10, 64086012), (12, 53405010), (15, 42724008), (18, 35603340), (19, 33729480), (20, 32043006), (24, 26702505), (27, 23735560), (30, 21362004), (36, 17801670), (38, 16864740), (40, 16021503), (45, 14241336), (54, 11867780), (57, 11243160), (60, 10681002), (72, 8900835), (76, 8432370), (90, 7120668), (95, 6745896), (108, 5933890), (114, 5621580), (120, 5340501), (135, 4747112), (152, 4216185), (171, 3747720), (180, 3560334), (190, 3372948), (216, 2966945), (228, 2810790), (270, 2373556), (285, 2248632), (342, 1873860), (360, 1780167), (380, 1686474), (456, 1405395), (513, 1249240), (540, 1186778), (570, 1124316), (684, 936930), (760, 843237), (855, 749544), (1026, 624620), (1080, 593389), (1140, 562158), (1368, 468465), (1710, 374772), (2052, 312310), (2280, 281079), (2565, 249848), (3420, 187386), (4104, 156155), (5130, 124924), (6840, 93693), (10260, 62462), (20520, 31231)]