640994991

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{10529}}^1$

素因数の和:10775

約数の個数: 32

約数和(自身を含む): 1056706560

約数和(自身を除く): 415711569

約数列:

[1, 3, 7, 13, 21, 39, 91, 223, 273, 669, 1561, 2899, 4683, 8697, 10529, 20293, 31587, 60879, 73703, 136877, 221109, 410631, 958139, 2347967, 2874417, 7043901, 16435769, 30523571, 49307307, 91570713, 213664997, 640994991]

約数ペア:

[(1, 640994991), (3, 213664997), (7, 91570713), (13, 49307307), (21, 30523571), (39, 16435769), (91, 7043901), (223, 2874417), (273, 2347967), (669, 958139), (1561, 410631), (2899, 221109), (4683, 136877), (8697, 73703), (10529, 60879), (20293, 31587)]