20859820

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11719}}^1$

素因数の和:11817

約数の個数: 24

約数和(自身を含む): 44301600

約数和(自身を除く): 23441780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 11719, 23438, 46876, 58595, 117190, 234380, 1042991, 2085982, 4171964, 5214955, 10429910, 20859820]

約数ペア:

[(1, 20859820), (2, 10429910), (4, 5214955), (5, 4171964), (10, 2085982), (20, 1042991), (89, 234380), (178, 117190), (356, 58595), (445, 46876), (890, 23438), (1780, 11719)]