20994975

素因数分解:

$3^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{4057}}^1$

素因数の和:4096

約数の個数: 36

約数和(自身を含む): 39248976

約数和(自身を除く): 18254001

約数列:

[1, 3, 5, 9, 15, 23, 25, 45, 69, 75, 115, 207, 225, 345, 575, 1035, 1725, 4057, 5175, 12171, 20285, 36513, 60855, 93311, 101425, 182565, 279933, 304275, 466555, 839799, 912825, 1399665, 2332775, 4198995, 6998325, 20994975]

約数ペア:

[(1, 20994975), (3, 6998325), (5, 4198995), (9, 2332775), (15, 1399665), (23, 912825), (25, 839799), (45, 466555), (69, 304275), (75, 279933), (115, 182565), (207, 101425), (225, 93311), (345, 60855), (575, 36513), (1035, 20285), (1725, 12171), (4057, 5175)]