18643375

素因数分解:

$5^3\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:220

約数の個数: 32

約数和(自身を含む): 24897600

約数和(自身を除く): 6254225

約数列:

[1, 5, 25, 29, 37, 125, 139, 145, 185, 695, 725, 925, 1073, 3475, 3625, 4031, 4625, 5143, 5365, 17375, 20155, 25715, 26825, 100775, 128575, 134125, 149147, 503875, 642875, 745735, 3728675, 18643375]

約数ペア:

[(1, 18643375), (5, 3728675), (25, 745735), (29, 642875), (37, 503875), (125, 149147), (139, 134125), (145, 128575), (185, 100775), (695, 26825), (725, 25715), (925, 20155), (1073, 17375), (3475, 5365), (3625, 5143), (4031, 4625)]