21795380

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{2141}}^1$

素因数の和:2659

約数の個数: 24

約数和(自身を含む): 45881640

約数和(自身を除く): 24086260

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 2036, 2141, 2545, 4282, 5090, 8564, 10180, 10705, 21410, 42820, 1089769, 2179538, 4359076, 5448845, 10897690, 21795380]

約数ペア:

[(1, 21795380), (2, 10897690), (4, 5448845), (5, 4359076), (10, 2179538), (20, 1089769), (509, 42820), (1018, 21410), (2036, 10705), (2141, 10180), (2545, 8564), (4282, 5090)]