21499814

素因数分解:

$2^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{109}}^1\times {\mathrm{193}}^1$

素因数の和:384

約数の個数: 32

約数和(自身を含む): 37899840

約数和(自身を除く): 16400026

約数列:

[1, 2, 7, 14, 73, 109, 146, 193, 218, 386, 511, 763, 1022, 1351, 1526, 2702, 7957, 14089, 15914, 21037, 28178, 42074, 55699, 98623, 111398, 147259, 197246, 294518, 1535701, 3071402, 10749907, 21499814]

約数ペア:

[(1, 21499814), (2, 10749907), (7, 3071402), (14, 1535701), (73, 294518), (109, 197246), (146, 147259), (193, 111398), (218, 98623), (386, 55699), (511, 42074), (763, 28178), (1022, 21037), (1351, 15914), (1526, 14089), (2702, 7957)]