21561138

素因数分解:

$2^1\times 3^2\times {\mathrm{71}}^1\times {\mathrm{16871}}^1$

素因数の和:16950

約数の個数: 24

約数和(自身を含む): 47376576

約数和(自身を除く): 25815438

約数列:

[1, 2, 3, 6, 9, 18, 71, 142, 213, 426, 639, 1278, 16871, 33742, 50613, 101226, 151839, 303678, 1197841, 2395682, 3593523, 7187046, 10780569, 21561138]

約数ペア:

[(1, 21561138), (2, 10780569), (3, 7187046), (6, 3593523), (9, 2395682), (18, 1197841), (71, 303678), (142, 151839), (213, 101226), (426, 50613), (639, 33742), (1278, 16871)]