21018964

素因数分解:

$2^2\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{4861}}^1$

素因数の和:4935

約数の個数: 24

約数和(自身を含む): 39207168

約数和(自身を除く): 18188204

約数列:

[1, 2, 4, 23, 46, 47, 92, 94, 188, 1081, 2162, 4324, 4861, 9722, 19444, 111803, 223606, 228467, 447212, 456934, 913868, 5254741, 10509482, 21018964]

約数ペア:

[(1, 21018964), (2, 10509482), (4, 5254741), (23, 913868), (46, 456934), (47, 447212), (92, 228467), (94, 223606), (188, 111803), (1081, 19444), (2162, 9722), (4324, 4861)]