203919921

素因数分解:

$3^2\times {\mathrm{157}}^1\times {\mathrm{277}}^1\times {\mathrm{521}}^1$

素因数の和:961

約数の個数: 24

約数和(自身を含む): 298068264

約数和(自身を除く): 94148343

約数列:

[1, 3, 9, 157, 277, 471, 521, 831, 1413, 1563, 2493, 4689, 43489, 81797, 130467, 144317, 245391, 391401, 432951, 736173, 1298853, 22657769, 67973307, 203919921]

約数ペア:

[(1, 203919921), (3, 67973307), (9, 22657769), (157, 1298853), (277, 736173), (471, 432951), (521, 391401), (831, 245391), (1413, 144317), (1563, 130467), (2493, 81797), (4689, 43489)]