20437767

素因数分解:

$3^2\times 7^1\times {\mathrm{401}}^1\times {\mathrm{809}}^1$

素因数の和:1223

約数の個数: 24

約数和(自身を含む): 33864480

約数和(自身を除く): 13426713

約数列:

[1, 3, 7, 9, 21, 63, 401, 809, 1203, 2427, 2807, 3609, 5663, 7281, 8421, 16989, 25263, 50967, 324409, 973227, 2270863, 2919681, 6812589, 20437767]

約数ペア:

[(1, 20437767), (3, 6812589), (7, 2919681), (9, 2270863), (21, 973227), (63, 324409), (401, 50967), (809, 25263), (1203, 16989), (2427, 8421), (2807, 7281), (3609, 5663)]