21395828

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{1583}}^1$

素因数の和:1727

約数の個数: 24

約数和(自身を含む): 39029760

約数和(自身を除く): 17633932

約数列:

[1, 2, 4, 31, 62, 109, 124, 218, 436, 1583, 3166, 3379, 6332, 6758, 13516, 49073, 98146, 172547, 196292, 345094, 690188, 5348957, 10697914, 21395828]

約数ペア:

[(1, 21395828), (2, 10697914), (4, 5348957), (31, 690188), (62, 345094), (109, 196292), (124, 172547), (218, 98146), (436, 49073), (1583, 13516), (3166, 6758), (3379, 6332)]