20707240

素因数分解:

$2^3\times 5^1\times {\mathrm{487}}^1\times {\mathrm{1063}}^1$

素因数の和:1561

約数の個数: 32

約数和(自身を含む): 46730880

約数和(自身を除く): 26023640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 487, 974, 1063, 1948, 2126, 2435, 3896, 4252, 4870, 5315, 8504, 9740, 10630, 19480, 21260, 42520, 517681, 1035362, 2070724, 2588405, 4141448, 5176810, 10353620, 20707240]

約数ペア:

[(1, 20707240), (2, 10353620), (4, 5176810), (5, 4141448), (8, 2588405), (10, 2070724), (20, 1035362), (40, 517681), (487, 42520), (974, 21260), (1063, 19480), (1948, 10630), (2126, 9740), (2435, 8504), (3896, 5315), (4252, 4870)]