21579580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{2087}}^1$

素因数の和:2154

約数の個数: 48

約数和(自身を含む): 50512896

約数和(自身を除く): 28933316

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 47, 55, 94, 110, 188, 220, 235, 470, 517, 940, 1034, 2068, 2087, 2585, 4174, 5170, 8348, 10340, 10435, 20870, 22957, 41740, 45914, 91828, 98089, 114785, 196178, 229570, 392356, 459140, 490445, 980890, 1078979, 1961780, 2157958, 4315916, 5394895, 10789790, 21579580]

約数ペア:

[(1, 21579580), (2, 10789790), (4, 5394895), (5, 4315916), (10, 2157958), (11, 1961780), (20, 1078979), (22, 980890), (44, 490445), (47, 459140), (55, 392356), (94, 229570), (110, 196178), (188, 114785), (220, 98089), (235, 91828), (470, 45914), (517, 41740), (940, 22957), (1034, 20870), (2068, 10435), (2087, 10340), (2585, 8348), (4174, 5170)]