20895550

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:134

約数の個数: 96

約数和(自身を含む): 46497024

約数和(自身を除く): 25601474

約数列:

[1, 2, 5, 10, 13, 17, 25, 26, 31, 34, 50, 61, 62, 65, 85, 122, 130, 155, 170, 221, 305, 310, 325, 403, 425, 442, 527, 610, 650, 775, 793, 806, 850, 1037, 1054, 1105, 1525, 1550, 1586, 1891, 2015, 2074, 2210, 2635, 3050, 3782, 3965, 4030, 5185, 5270, 5525, 6851, 7930, 9455, 10075, 10370, 11050, 13175, 13481, 13702, 18910, 19825, 20150, 24583, 25925, 26350, 26962, 32147, 34255, 39650, 47275, 49166, 51850, 64294, 67405, 68510, 94550, 122915, 134810, 160735, 171275, 245830, 321470, 337025, 342550, 417911, 614575, 674050, 803675, 835822, 1229150, 1607350, 2089555, 4179110, 10447775, 20895550]

約数ペア:

[(1, 20895550), (2, 10447775), (5, 4179110), (10, 2089555), (13, 1607350), (17, 1229150), (25, 835822), (26, 803675), (31, 674050), (34, 614575), (50, 417911), (61, 342550), (62, 337025), (65, 321470), (85, 245830), (122, 171275), (130, 160735), (155, 134810), (170, 122915), (221, 94550), (305, 68510), (310, 67405), (325, 64294), (403, 51850), (425, 49166), (442, 47275), (527, 39650), (610, 34255), (650, 32147), (775, 26962), (793, 26350), (806, 25925), (850, 24583), (1037, 20150), (1054, 19825), (1105, 18910), (1525, 13702), (1550, 13481), (1586, 13175), (1891, 11050), (2015, 10370), (2074, 10075), (2210, 9455), (2635, 7930), (3050, 6851), (3782, 5525), (3965, 5270), (4030, 5185)]