638996931

素因数分解:

$3^6\times {\mathrm{41}}^1\times {\mathrm{21379}}^1$

素因数の和:21438

約数の個数: 28

約数和(自身を含む): 981470280

約数和(自身を除く): 342473349

約数列:

[1, 3, 9, 27, 41, 81, 123, 243, 369, 729, 1107, 3321, 9963, 21379, 29889, 64137, 192411, 577233, 876539, 1731699, 2629617, 5195097, 7888851, 15585291, 23666553, 70999659, 212998977, 638996931]

約数ペア:

[(1, 638996931), (3, 212998977), (9, 70999659), (27, 23666553), (41, 15585291), (81, 7888851), (123, 5195097), (243, 2629617), (369, 1731699), (729, 876539), (1107, 577233), (3321, 192411), (9963, 64137), (21379, 29889)]