21716457

素因数分解:

$3^1\times 7^2\times {\mathrm{97}}^1\times {\mathrm{1523}}^1$

素因数の和:1637

約数の個数: 24

約数和(自身を含む): 34052256

約数和(自身を除く): 12335799

約数列:

[1, 3, 7, 21, 49, 97, 147, 291, 679, 1523, 2037, 4569, 4753, 10661, 14259, 31983, 74627, 147731, 223881, 443193, 1034117, 3102351, 7238819, 21716457]

約数ペア:

[(1, 21716457), (3, 7238819), (7, 3102351), (21, 1034117), (49, 443193), (97, 223881), (147, 147731), (291, 74627), (679, 31983), (1523, 14259), (2037, 10661), (4569, 4753)]