21055660

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{4721}}^1$

素因数の和:4953

約数の個数: 24

約数和(自身を含む): 44424576

約数和(自身を除く): 23368916

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4460, 4721, 9442, 18884, 23605, 47210, 94420, 1052783, 2105566, 4211132, 5263915, 10527830, 21055660]

約数ペア:

[(1, 21055660), (2, 10527830), (4, 5263915), (5, 4211132), (10, 2105566), (20, 1052783), (223, 94420), (446, 47210), (892, 23605), (1115, 18884), (2230, 9442), (4460, 4721)]