21271355

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{1103}}^1$

素因数の和:1163

約数の個数: 32

約数和(自身を含む): 31795200

約数和(自身を除く): 10523845

約数列:

[1, 5, 7, 19, 29, 35, 95, 133, 145, 203, 551, 665, 1015, 1103, 2755, 3857, 5515, 7721, 19285, 20957, 31987, 38605, 104785, 146699, 159935, 223909, 607753, 733495, 1119545, 3038765, 4254271, 21271355]

約数ペア:

[(1, 21271355), (5, 4254271), (7, 3038765), (19, 1119545), (29, 733495), (35, 607753), (95, 223909), (133, 159935), (145, 146699), (203, 104785), (551, 38605), (665, 31987), (1015, 20957), (1103, 19285), (2755, 7721), (3857, 5515)]