20645225

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{1567}}^1$

素因数の和:1625

約数の個数: 24

約数和(自身を含む): 27998208

約数和(自身を除く): 7352983

約数列:

[1, 5, 17, 25, 31, 85, 155, 425, 527, 775, 1567, 2635, 7835, 13175, 26639, 39175, 48577, 133195, 242885, 665975, 825809, 1214425, 4129045, 20645225]

約数ペア:

[(1, 20645225), (5, 4129045), (17, 1214425), (25, 825809), (31, 665975), (85, 242885), (155, 133195), (425, 48577), (527, 39175), (775, 26639), (1567, 13175), (2635, 7835)]