20918961

素因数分解:

$3^2\times 7^1\times {\mathrm{223}}^1\times {\mathrm{1489}}^1$

素因数の和:1725

約数の個数: 24

約数和(自身を含む): 34711040

約数和(自身を除く): 13792079

約数列:

[1, 3, 7, 9, 21, 63, 223, 669, 1489, 1561, 2007, 4467, 4683, 10423, 13401, 14049, 31269, 93807, 332047, 996141, 2324329, 2988423, 6972987, 20918961]

約数ペア:

[(1, 20918961), (3, 6972987), (7, 2988423), (9, 2324329), (21, 996141), (63, 332047), (223, 93807), (669, 31269), (1489, 14049), (1561, 13401), (2007, 10423), (4467, 4683)]