21074207

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{139}}^1\times {\mathrm{179}}^1$

素因数の和:347

約数の個数: 24

約数和(自身を含む): 26812800

約数和(自身を除く): 5738593

約数列:

[1, 7, 11, 77, 121, 139, 179, 847, 973, 1253, 1529, 1969, 10703, 13783, 16819, 21659, 24881, 117733, 151613, 174167, 273691, 1915837, 3010601, 21074207]

約数ペア:

[(1, 21074207), (7, 3010601), (11, 1915837), (77, 273691), (121, 174167), (139, 151613), (179, 117733), (847, 24881), (973, 21659), (1253, 16819), (1529, 13783), (1969, 10703)]