21144820

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1069}}^1$

素因数の和:1144

約数の個数: 48

約数和(自身を含む): 47456640

約数和(自身を除く): 26311820

約数列:

[1, 2, 4, 5, 10, 20, 23, 43, 46, 86, 92, 115, 172, 215, 230, 430, 460, 860, 989, 1069, 1978, 2138, 3956, 4276, 4945, 5345, 9890, 10690, 19780, 21380, 24587, 45967, 49174, 91934, 98348, 122935, 183868, 229835, 245870, 459670, 491740, 919340, 1057241, 2114482, 4228964, 5286205, 10572410, 21144820]

約数ペア:

[(1, 21144820), (2, 10572410), (4, 5286205), (5, 4228964), (10, 2114482), (20, 1057241), (23, 919340), (43, 491740), (46, 459670), (86, 245870), (92, 229835), (115, 183868), (172, 122935), (215, 98348), (230, 91934), (430, 49174), (460, 45967), (860, 24587), (989, 21380), (1069, 19780), (1978, 10690), (2138, 9890), (3956, 5345), (4276, 4945)]