21007269

素因数分解:

$3^4\times {\mathrm{223}}^1\times {\mathrm{1163}}^1$

素因数の和:1398

約数の個数: 20

約数和(自身を含む): 31549056

約数和(自身を除く): 10541787

約数列:

[1, 3, 9, 27, 81, 223, 669, 1163, 2007, 3489, 6021, 10467, 18063, 31401, 94203, 259349, 778047, 2334141, 7002423, 21007269]

約数ペア:

[(1, 21007269), (3, 7002423), (9, 2334141), (27, 778047), (81, 259349), (223, 94203), (669, 31401), (1163, 18063), (2007, 10467), (3489, 6021)]