640777761

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{787}}^1\times {\mathrm{6959}}^1$

素因数の和:7765

約数の個数: 24

約数和(自身を含む): 998175360

約数和(自身を除く): 357397599

約数列:

[1, 3, 9, 13, 39, 117, 787, 2361, 6959, 7083, 10231, 20877, 30693, 62631, 90467, 92079, 271401, 814203, 5476733, 16430199, 49290597, 71197529, 213592587, 640777761]

約数ペア:

[(1, 640777761), (3, 213592587), (9, 71197529), (13, 49290597), (39, 16430199), (117, 5476733), (787, 814203), (2361, 271401), (6959, 92079), (7083, 90467), (10231, 62631), (20877, 30693)]