18862940

素因数分解:

$2^2\times 5^1\times {\mathrm{443}}^1\times {\mathrm{2129}}^1$

素因数の和:2581

約数の個数: 24

約数和(自身を含む): 39720240

約数和(自身を除く): 20857300

約数列:

[1, 2, 4, 5, 10, 20, 443, 886, 1772, 2129, 2215, 4258, 4430, 8516, 8860, 10645, 21290, 42580, 943147, 1886294, 3772588, 4715735, 9431470, 18862940]

約数ペア:

[(1, 18862940), (2, 9431470), (4, 4715735), (5, 3772588), (10, 1886294), (20, 943147), (443, 42580), (886, 21290), (1772, 10645), (2129, 8860), (2215, 8516), (4258, 4430)]