1908915125

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{1607}}^1$

素因数の和:1695

約数の個数: 64

約数和(自身を含む): 2781402624

約数和(自身を除く): 872487499

約数列:

[1, 5, 13, 17, 25, 43, 65, 85, 125, 215, 221, 325, 425, 559, 731, 1075, 1105, 1607, 1625, 2125, 2795, 3655, 5375, 5525, 8035, 9503, 13975, 18275, 20891, 27319, 27625, 40175, 47515, 69101, 69875, 91375, 104455, 136595, 200875, 237575, 345505, 355147, 522275, 682975, 898313, 1174717, 1187875, 1727525, 1775735, 2611375, 3414875, 4491565, 5873585, 8637625, 8878675, 15271321, 22457825, 29367925, 44393375, 76356605, 112289125, 146839625, 381783025, 1908915125]

約数ペア:

[(1, 1908915125), (5, 381783025), (13, 146839625), (17, 112289125), (25, 76356605), (43, 44393375), (65, 29367925), (85, 22457825), (125, 15271321), (215, 8878675), (221, 8637625), (325, 5873585), (425, 4491565), (559, 3414875), (731, 2611375), (1075, 1775735), (1105, 1727525), (1607, 1187875), (1625, 1174717), (2125, 898313), (2795, 682975), (3655, 522275), (5375, 355147), (5525, 345505), (8035, 237575), (9503, 200875), (13975, 136595), (18275, 104455), (20891, 91375), (27319, 69875), (27625, 69101), (40175, 47515)]