20315980

素因数分解:

$2^2\times 5^1\times {\mathrm{443}}^1\times {\mathrm{2293}}^1$

素因数の和:2745

約数の個数: 24

約数和(自身を含む): 42778512

約数和(自身を除く): 22462532

約数列:

[1, 2, 4, 5, 10, 20, 443, 886, 1772, 2215, 2293, 4430, 4586, 8860, 9172, 11465, 22930, 45860, 1015799, 2031598, 4063196, 5078995, 10157990, 20315980]

約数ペア:

[(1, 20315980), (2, 10157990), (4, 5078995), (5, 4063196), (10, 2031598), (20, 1015799), (443, 45860), (886, 22930), (1772, 11465), (2215, 9172), (2293, 8860), (4430, 4586)]