20218821

素因数分解:

$3^1\times 7^5\times {\mathrm{401}}^1$

素因数の和:439

約数の個数: 24

約数和(自身を含む): 31529664

約数和(自身を除く): 11310843

約数列:

[1, 3, 7, 21, 49, 147, 343, 401, 1029, 1203, 2401, 2807, 7203, 8421, 16807, 19649, 50421, 58947, 137543, 412629, 962801, 2888403, 6739607, 20218821]

約数ペア:

[(1, 20218821), (3, 6739607), (7, 2888403), (21, 962801), (49, 412629), (147, 137543), (343, 58947), (401, 50421), (1029, 19649), (1203, 16807), (2401, 8421), (2807, 7203)]