21209360

素因数分解:

$2^4\times 5^1\times {\mathrm{265117}}^1$

素因数の和:265130

約数の個数: 20

約数和(自身を含む): 49311948

約数和(自身を除く): 28102588

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 265117, 530234, 1060468, 1325585, 2120936, 2651170, 4241872, 5302340, 10604680, 21209360]

約数ペア:

[(1, 21209360), (2, 10604680), (4, 5302340), (5, 4241872), (8, 2651170), (10, 2120936), (16, 1325585), (20, 1060468), (40, 530234), (80, 265117)]