20431450

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^2$

素因数の和:128

約数の個数: 72

約数和(自身を含む): 44364348

約数和(自身を除く): 23932898

約数列:

[1, 2, 5, 10, 13, 17, 25, 26, 34, 43, 50, 65, 85, 86, 130, 170, 215, 221, 325, 425, 430, 442, 559, 650, 731, 850, 1075, 1105, 1118, 1462, 1849, 2150, 2210, 2795, 3655, 3698, 5525, 5590, 7310, 9245, 9503, 11050, 13975, 18275, 18490, 19006, 24037, 27950, 31433, 36550, 46225, 47515, 48074, 62866, 92450, 95030, 120185, 157165, 237575, 240370, 314330, 408629, 475150, 600925, 785825, 817258, 1201850, 1571650, 2043145, 4086290, 10215725, 20431450]

約数ペア:

[(1, 20431450), (2, 10215725), (5, 4086290), (10, 2043145), (13, 1571650), (17, 1201850), (25, 817258), (26, 785825), (34, 600925), (43, 475150), (50, 408629), (65, 314330), (85, 240370), (86, 237575), (130, 157165), (170, 120185), (215, 95030), (221, 92450), (325, 62866), (425, 48074), (430, 47515), (442, 46225), (559, 36550), (650, 31433), (731, 27950), (850, 24037), (1075, 19006), (1105, 18490), (1118, 18275), (1462, 13975), (1849, 11050), (2150, 9503), (2210, 9245), (2795, 7310), (3655, 5590), (3698, 5525)]