20687860

素因数分解:

$2^2\times 5^1\times {\mathrm{229}}^1\times {\mathrm{4517}}^1$

素因数の和:4755

約数の個数: 24

約数和(自身を含む): 43643880

約数和(自身を除く): 22956020

約数列:

[1, 2, 4, 5, 10, 20, 229, 458, 916, 1145, 2290, 4517, 4580, 9034, 18068, 22585, 45170, 90340, 1034393, 2068786, 4137572, 5171965, 10343930, 20687860]

約数ペア:

[(1, 20687860), (2, 10343930), (4, 5171965), (5, 4137572), (10, 2068786), (20, 1034393), (229, 90340), (458, 45170), (916, 22585), (1145, 18068), (2290, 9034), (4517, 4580)]