21687445

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{229}}^1$

素因数の和:325

約数の個数: 32

約数和(自身を含む): 29675520

約数和(自身を除く): 7988075

約数列:

[1, 5, 13, 31, 47, 65, 155, 229, 235, 403, 611, 1145, 1457, 2015, 2977, 3055, 7099, 7285, 10763, 14885, 18941, 35495, 53815, 92287, 94705, 139919, 333653, 461435, 699595, 1668265, 4337489, 21687445]

約数ペア:

[(1, 21687445), (5, 4337489), (13, 1668265), (31, 699595), (47, 461435), (65, 333653), (155, 139919), (229, 94705), (235, 92287), (403, 53815), (611, 35495), (1145, 18941), (1457, 14885), (2015, 10763), (2977, 7285), (3055, 7099)]