21268040

素因数分解:

$2^3\times 5^1\times {\mathrm{531701}}^1$

素因数の和:531712

約数の個数: 16

約数和(自身を含む): 47853180

約数和(自身を除く): 26585140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 531701, 1063402, 2126804, 2658505, 4253608, 5317010, 10634020, 21268040]

約数ペア:

[(1, 21268040), (2, 10634020), (4, 5317010), (5, 4253608), (8, 2658505), (10, 2126804), (20, 1063402), (40, 531701)]