20518125

素因数分解:

$3^1\times 5^4\times {\mathrm{31}}^1\times {\mathrm{353}}^1$

素因数の和:407

約数の個数: 40

約数和(自身を含む): 35388672

約数和(自身を除く): 14870547

約数列:

[1, 3, 5, 15, 25, 31, 75, 93, 125, 155, 353, 375, 465, 625, 775, 1059, 1765, 1875, 2325, 3875, 5295, 8825, 10943, 11625, 19375, 26475, 32829, 44125, 54715, 58125, 132375, 164145, 220625, 273575, 661875, 820725, 1367875, 4103625, 6839375, 20518125]

約数ペア:

[(1, 20518125), (3, 6839375), (5, 4103625), (15, 1367875), (25, 820725), (31, 661875), (75, 273575), (93, 220625), (125, 164145), (155, 132375), (353, 58125), (375, 54715), (465, 44125), (625, 32829), (775, 26475), (1059, 19375), (1765, 11625), (1875, 10943), (2325, 8825), (3875, 5295)]