21402904

素因数分解:

$2^3\times {\mathrm{809}}^1\times {\mathrm{3307}}^1$

素因数の和:4122

約数の個数: 16

約数和(自身を含む): 40192200

約数和(自身を除く): 18789296

約数列:

[1, 2, 4, 8, 809, 1618, 3236, 3307, 6472, 6614, 13228, 26456, 2675363, 5350726, 10701452, 21402904]

約数ペア:

[(1, 21402904), (2, 10701452), (4, 5350726), (8, 2675363), (809, 26456), (1618, 13228), (3236, 6614), (3307, 6472)]