20005880

素因数分解:

$2^3\times 5^1\times {\mathrm{443}}^1\times {\mathrm{1129}}^1$

素因数の和:1583

約数の個数: 32

約数和(自身を含む): 45154800

約数和(自身を除く): 25148920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 443, 886, 1129, 1772, 2215, 2258, 3544, 4430, 4516, 5645, 8860, 9032, 11290, 17720, 22580, 45160, 500147, 1000294, 2000588, 2500735, 4001176, 5001470, 10002940, 20005880]

約数ペア:

[(1, 20005880), (2, 10002940), (4, 5001470), (5, 4001176), (8, 2500735), (10, 2000588), (20, 1000294), (40, 500147), (443, 45160), (886, 22580), (1129, 17720), (1772, 11290), (2215, 9032), (2258, 8860), (3544, 5645), (4430, 4516)]