20521977

素因数分解:

$3^1\times 7^1\times {\mathrm{401}}^1\times {\mathrm{2437}}^1$

素因数の和:2848

約数の個数: 16

約数和(自身を含む): 31362432

約数和(自身を除く): 10840455

約数列:

[1, 3, 7, 21, 401, 1203, 2437, 2807, 7311, 8421, 17059, 51177, 977237, 2931711, 6840659, 20521977]

約数ペア:

[(1, 20521977), (3, 6840659), (7, 2931711), (21, 977237), (401, 51177), (1203, 17059), (2437, 8421), (2807, 7311)]