21585431

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{179}}^1$

素因数の和:323

約数の個数: 24

約数和(自身を含む): 26593920

約数和(自身を除く): 5008489

約数列:

[1, 7, 23, 49, 107, 161, 179, 749, 1127, 1253, 2461, 4117, 5243, 8771, 17227, 19153, 28819, 120589, 134071, 201733, 440519, 938497, 3083633, 21585431]

約数ペア:

[(1, 21585431), (7, 3083633), (23, 938497), (49, 440519), (107, 201733), (161, 134071), (179, 120589), (749, 28819), (1127, 19153), (1253, 17227), (2461, 8771), (4117, 5243)]