21896049

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{103}}^1\times {\mathrm{191}}^1$

素因数の和:357

約数の個数: 32

約数和(自身を含む): 34504704

約数和(自身を除く): 12608655

約数列:

[1, 3, 7, 21, 53, 103, 159, 191, 309, 371, 573, 721, 1113, 1337, 2163, 4011, 5459, 10123, 16377, 19673, 30369, 38213, 59019, 70861, 114639, 137711, 212583, 413133, 1042669, 3128007, 7298683, 21896049]

約数ペア:

[(1, 21896049), (3, 7298683), (7, 3128007), (21, 1042669), (53, 413133), (103, 212583), (159, 137711), (191, 114639), (309, 70861), (371, 59019), (573, 38213), (721, 30369), (1113, 19673), (1337, 16377), (2163, 10123), (4011, 5459)]