90871781

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{3947}}^1$

素因数の和:4001

約数の個数: 32

約数和(自身を含む): 127346688

約数和(自身を除く): 36474907

約数列:

[1, 7, 11, 13, 23, 77, 91, 143, 161, 253, 299, 1001, 1771, 2093, 3289, 3947, 23023, 27629, 43417, 51311, 90781, 303919, 359177, 564421, 635467, 998591, 1180153, 3950947, 6990137, 8261071, 12981683, 90871781]

約数ペア:

[(1, 90871781), (7, 12981683), (11, 8261071), (13, 6990137), (23, 3950947), (77, 1180153), (91, 998591), (143, 635467), (161, 564421), (253, 359177), (299, 303919), (1001, 90781), (1771, 51311), (2093, 43417), (3289, 27629), (3947, 23023)]