21316860

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{271}}^1$

素因数の和:328

約数の個数: 144

約数和(自身を含む): 71285760

約数和(自身を除く): 49968900

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 23, 30, 36, 38, 45, 46, 57, 60, 69, 76, 90, 92, 95, 114, 115, 138, 171, 180, 190, 207, 228, 230, 271, 276, 285, 342, 345, 380, 414, 437, 460, 542, 570, 684, 690, 813, 828, 855, 874, 1035, 1084, 1140, 1311, 1355, 1380, 1626, 1710, 1748, 2070, 2185, 2439, 2622, 2710, 3252, 3420, 3933, 4065, 4140, 4370, 4878, 5149, 5244, 5420, 6233, 6555, 7866, 8130, 8740, 9756, 10298, 12195, 12466, 13110, 15447, 15732, 16260, 18699, 19665, 20596, 24390, 24932, 25745, 26220, 30894, 31165, 37398, 39330, 46341, 48780, 51490, 56097, 61788, 62330, 74796, 77235, 78660, 92682, 93495, 102980, 112194, 118427, 124660, 154470, 185364, 186990, 224388, 231705, 236854, 280485, 308940, 355281, 373980, 463410, 473708, 560970, 592135, 710562, 926820, 1065843, 1121940, 1184270, 1421124, 1776405, 2131686, 2368540, 3552810, 4263372, 5329215, 7105620, 10658430, 21316860]

約数ペア:

[(1, 21316860), (2, 10658430), (3, 7105620), (4, 5329215), (5, 4263372), (6, 3552810), (9, 2368540), (10, 2131686), (12, 1776405), (15, 1421124), (18, 1184270), (19, 1121940), (20, 1065843), (23, 926820), (30, 710562), (36, 592135), (38, 560970), (45, 473708), (46, 463410), (57, 373980), (60, 355281), (69, 308940), (76, 280485), (90, 236854), (92, 231705), (95, 224388), (114, 186990), (115, 185364), (138, 154470), (171, 124660), (180, 118427), (190, 112194), (207, 102980), (228, 93495), (230, 92682), (271, 78660), (276, 77235), (285, 74796), (342, 62330), (345, 61788), (380, 56097), (414, 51490), (437, 48780), (460, 46341), (542, 39330), (570, 37398), (684, 31165), (690, 30894), (813, 26220), (828, 25745), (855, 24932), (874, 24390), (1035, 20596), (1084, 19665), (1140, 18699), (1311, 16260), (1355, 15732), (1380, 15447), (1626, 13110), (1710, 12466), (1748, 12195), (2070, 10298), (2185, 9756), (2439, 8740), (2622, 8130), (2710, 7866), (3252, 6555), (3420, 6233), (3933, 5420), (4065, 5244), (4140, 5149), (4370, 4878)]