128681020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{494927}}^1$

素因数の和:494949

約数の個数: 24

約数和(自身を含む): 291017664

約数和(自身を除く): 162336644

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 494927, 989854, 1979708, 2474635, 4949270, 6434051, 9898540, 12868102, 25736204, 32170255, 64340510, 128681020]

約数ペア:

[(1, 128681020), (2, 64340510), (4, 32170255), (5, 25736204), (10, 12868102), (13, 9898540), (20, 6434051), (26, 4949270), (52, 2474635), (65, 1979708), (130, 989854), (260, 494927)]