687609

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{653}}^1$

素因数の和:678

約数の個数: 20

約数和(自身を含む): 1107876

約数和(自身を除く): 420267

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 653, 1053, 1959, 5877, 8489, 17631, 25467, 52893, 76401, 229203, 687609]

約数ペア:

[(1, 687609), (3, 229203), (9, 76401), (13, 52893), (27, 25467), (39, 17631), (81, 8489), (117, 5877), (351, 1959), (653, 1053)]