20181850

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{509}}^1$

素因数の和:595

約数の個数: 48

約数和(自身を含む): 41169240

約数和(自身を除く): 20987390

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 61, 65, 122, 130, 305, 325, 509, 610, 650, 793, 1018, 1525, 1586, 2545, 3050, 3965, 5090, 6617, 7930, 12725, 13234, 19825, 25450, 31049, 33085, 39650, 62098, 66170, 155245, 165425, 310490, 330850, 403637, 776225, 807274, 1552450, 2018185, 4036370, 10090925, 20181850]

約数ペア:

[(1, 20181850), (2, 10090925), (5, 4036370), (10, 2018185), (13, 1552450), (25, 807274), (26, 776225), (50, 403637), (61, 330850), (65, 310490), (122, 165425), (130, 155245), (305, 66170), (325, 62098), (509, 39650), (610, 33085), (650, 31049), (793, 25450), (1018, 19825), (1525, 13234), (1586, 12725), (2545, 7930), (3050, 6617), (3965, 5090)]