21351395

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{241}}^1$

素因数の和:335

約数の個数: 32

約数和(自身を含む): 29272320

約数和(自身を除く): 7920925

約数列:

[1, 5, 13, 29, 47, 65, 145, 235, 241, 377, 611, 1205, 1363, 1885, 3055, 3133, 6815, 6989, 11327, 15665, 17719, 34945, 56635, 88595, 90857, 147251, 328483, 454285, 736255, 1642415, 4270279, 21351395]

約数ペア:

[(1, 21351395), (5, 4270279), (13, 1642415), (29, 736255), (47, 454285), (65, 328483), (145, 147251), (235, 90857), (241, 88595), (377, 56635), (611, 34945), (1205, 17719), (1363, 15665), (1885, 11327), (3055, 6989), (3133, 6815)]