21000251961

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{9446807}}^1$

素因数の和:9446845

約数の個数: 24

約数和(自身を含む): 34386381120

約数和(自身を除く): 13386129159

約数列:

[1, 3, 9, 13, 19, 39, 57, 117, 171, 247, 741, 2223, 9446807, 28340421, 85021263, 122808491, 179489333, 368425473, 538467999, 1105276419, 1615403997, 2333361329, 7000083987, 21000251961]

約数ペア:

[(1, 21000251961), (3, 7000083987), (9, 2333361329), (13, 1615403997), (19, 1105276419), (39, 538467999), (57, 368425473), (117, 179489333), (171, 122808491), (247, 85021263), (741, 28340421), (2223, 9446807)]