156795620

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{128521}}^1$

素因数の和:128591

約数の個数: 24

約数和(自身を含む): 334671288

約数和(自身を除く): 177875668

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 128521, 257042, 514084, 642605, 1285210, 2570420, 7839781, 15679562, 31359124, 39198905, 78397810, 156795620]

約数ペア:

[(1, 156795620), (2, 78397810), (4, 39198905), (5, 31359124), (10, 15679562), (20, 7839781), (61, 2570420), (122, 1285210), (244, 642605), (305, 514084), (610, 257042), (1220, 128521)]