21155408

素因数分解:

$2^4\times {\mathrm{113}}^1\times {\mathrm{11701}}^1$

素因数の和:11822

約数の個数: 20

約数和(自身を含む): 41354868

約数和(自身を除く): 20199460

約数列:

[1, 2, 4, 8, 16, 113, 226, 452, 904, 1808, 11701, 23402, 46804, 93608, 187216, 1322213, 2644426, 5288852, 10577704, 21155408]

約数ペア:

[(1, 21155408), (2, 10577704), (4, 5288852), (8, 2644426), (16, 1322213), (113, 187216), (226, 93608), (452, 46804), (904, 23402), (1808, 11701)]