21870261

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{8467}}^1$

素因数の和:8521

約数の個数: 24

約数和(自身を含む): 36988224

約数和(自身を除く): 15117963

約数列:

[1, 3, 7, 9, 21, 41, 63, 123, 287, 369, 861, 2583, 8467, 25401, 59269, 76203, 177807, 347147, 533421, 1041441, 2430029, 3124323, 7290087, 21870261]

約数ペア:

[(1, 21870261), (3, 7290087), (7, 3124323), (9, 2430029), (21, 1041441), (41, 533421), (63, 347147), (123, 177807), (287, 76203), (369, 59269), (861, 25401), (2583, 8467)]