21292780

素因数分解:

$2^2\times 5^1\times {\mathrm{761}}^1\times {\mathrm{1399}}^1$

素因数の和:2169

約数の個数: 24

約数和(自身を含む): 44805600

約数和(自身を除く): 23512820

約数列:

[1, 2, 4, 5, 10, 20, 761, 1399, 1522, 2798, 3044, 3805, 5596, 6995, 7610, 13990, 15220, 27980, 1064639, 2129278, 4258556, 5323195, 10646390, 21292780]

約数ペア:

[(1, 21292780), (2, 10646390), (4, 5323195), (5, 4258556), (10, 2129278), (20, 1064639), (761, 27980), (1399, 15220), (1522, 13990), (2798, 7610), (3044, 6995), (3805, 5596)]