639561

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{31}}^1$

素因数の和:93

約数の個数: 24

約数和(自身を含む): 990976

約数和(自身を除く): 351415

約数列:

[1, 3, 13, 23, 31, 39, 69, 93, 299, 403, 529, 713, 897, 1209, 1587, 2139, 6877, 9269, 16399, 20631, 27807, 49197, 213187, 639561]

約数ペア:

[(1, 639561), (3, 213187), (13, 49197), (23, 27807), (31, 20631), (39, 16399), (69, 9269), (93, 6877), (299, 2139), (403, 1587), (529, 1209), (713, 897)]