21166540

素因数分解:

$2^2\times 5^1\times {\mathrm{443}}^1\times {\mathrm{2389}}^1$

素因数の和:2841

約数の個数: 24

約数和(自身を含む): 44568720

約数和(自身を除く): 23402180

約数列:

[1, 2, 4, 5, 10, 20, 443, 886, 1772, 2215, 2389, 4430, 4778, 8860, 9556, 11945, 23890, 47780, 1058327, 2116654, 4233308, 5291635, 10583270, 21166540]

約数ペア:

[(1, 21166540), (2, 10583270), (4, 5291635), (5, 4233308), (10, 2116654), (20, 1058327), (443, 47780), (886, 23890), (1772, 11945), (2215, 9556), (2389, 8860), (4430, 4778)]