20418760

素因数分解:

$2^3\times 5^1\times {\mathrm{457}}^1\times {\mathrm{1117}}^1$

素因数の和:1585

約数の個数: 32

約数和(自身を含む): 46083960

約数和(自身を除く): 25665200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 457, 914, 1117, 1828, 2234, 2285, 3656, 4468, 4570, 5585, 8936, 9140, 11170, 18280, 22340, 44680, 510469, 1020938, 2041876, 2552345, 4083752, 5104690, 10209380, 20418760]

約数ペア:

[(1, 20418760), (2, 10209380), (4, 5104690), (5, 4083752), (8, 2552345), (10, 2041876), (20, 1020938), (40, 510469), (457, 44680), (914, 22340), (1117, 18280), (1828, 11170), (2234, 9140), (2285, 8936), (3656, 5585), (4468, 4570)]