21212816

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{69779}}^1$

素因数の和:69806

約数の個数: 20

約数和(自身を含む): 43263600

約数和(自身を除く): 22050784

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 69779, 139558, 279116, 558232, 1116464, 1325801, 2651602, 5303204, 10606408, 21212816]

約数ペア:

[(1, 21212816), (2, 10606408), (4, 5303204), (8, 2651602), (16, 1325801), (19, 1116464), (38, 558232), (76, 279116), (152, 139558), (304, 69779)]