28312557

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{757}}^1$

素因数の和:917

約数の個数: 32

約数和(自身を含む): 46862592

約数和(自身を除く): 18550035

約数列:

[1, 3, 7, 13, 21, 39, 91, 137, 273, 411, 757, 959, 1781, 2271, 2877, 5299, 5343, 9841, 12467, 15897, 29523, 37401, 68887, 103709, 206661, 311127, 725963, 1348217, 2177889, 4044651, 9437519, 28312557]

約数ペア:

[(1, 28312557), (3, 9437519), (7, 4044651), (13, 2177889), (21, 1348217), (39, 725963), (91, 311127), (137, 206661), (273, 103709), (411, 68887), (757, 37401), (959, 29523), (1781, 15897), (2271, 12467), (2877, 9841), (5299, 5343)]