21497307

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{109}}^1\times {\mathrm{389}}^1$

素因数の和:527

約数の個数: 24

約数和(自身を含む): 31402800

約数和(自身を除く): 9905493

約数列:

[1, 3, 13, 39, 109, 169, 327, 389, 507, 1167, 1417, 4251, 5057, 15171, 18421, 42401, 55263, 65741, 127203, 197223, 551213, 1653639, 7165769, 21497307]

約数ペア:

[(1, 21497307), (3, 7165769), (13, 1653639), (39, 551213), (109, 197223), (169, 127203), (327, 65741), (389, 55263), (507, 42401), (1167, 18421), (1417, 15171), (4251, 5057)]