21612740

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26357}}^1$

素因数の和:26407

約数の個数: 24

約数和(自身を含む): 46495512

約数和(自身を除く): 24882772

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26357, 52714, 105428, 131785, 263570, 527140, 1080637, 2161274, 4322548, 5403185, 10806370, 21612740]

約数ペア:

[(1, 21612740), (2, 10806370), (4, 5403185), (5, 4322548), (10, 2161274), (20, 1080637), (41, 527140), (82, 263570), (164, 131785), (205, 105428), (410, 52714), (820, 26357)]