21451703

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{653}}^1$

素因数の和:711

約数の個数: 24

約数和(自身を含む): 27907488

約数和(自身を除く): 6455785

約数列:

[1, 7, 13, 19, 91, 133, 247, 361, 653, 1729, 2527, 4571, 4693, 8489, 12407, 32851, 59423, 86849, 161291, 235733, 1129037, 1650131, 3064529, 21451703]

約数ペア:

[(1, 21451703), (7, 3064529), (13, 1650131), (19, 1129037), (91, 235733), (133, 161291), (247, 86849), (361, 59423), (653, 32851), (1729, 12407), (2527, 8489), (4571, 4693)]