21739580

素因数分解:

$2^2\times 5^1\times {\mathrm{263}}^1\times {\mathrm{4133}}^1$

素因数の和:4405

約数の個数: 24

約数和(自身を含む): 45837792

約数和(自身を除く): 24098212

約数列:

[1, 2, 4, 5, 10, 20, 263, 526, 1052, 1315, 2630, 4133, 5260, 8266, 16532, 20665, 41330, 82660, 1086979, 2173958, 4347916, 5434895, 10869790, 21739580]

約数ペア:

[(1, 21739580), (2, 10869790), (4, 5434895), (5, 4347916), (10, 2173958), (20, 1086979), (263, 82660), (526, 41330), (1052, 20665), (1315, 16532), (2630, 8266), (4133, 5260)]