28120940

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{5471}}^1$

素因数の和:5737

約数の個数: 24

約数和(自身を含む): 59294592

約数和(自身を除く): 31173652

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 5140, 5471, 10942, 21884, 27355, 54710, 109420, 1406047, 2812094, 5624188, 7030235, 14060470, 28120940]

約数ペア:

[(1, 28120940), (2, 14060470), (4, 7030235), (5, 5624188), (10, 2812094), (20, 1406047), (257, 109420), (514, 54710), (1028, 27355), (1285, 21884), (2570, 10942), (5140, 5471)]