128465980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{90469}}^1$

素因数の和:90549

約数の個数: 24

約数和(自身を含む): 273581280

約数和(自身を除く): 145115300

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 90469, 180938, 361876, 452345, 904690, 1809380, 6423299, 12846598, 25693196, 32116495, 64232990, 128465980]

約数ペア:

[(1, 128465980), (2, 64232990), (4, 32116495), (5, 25693196), (10, 12846598), (20, 6423299), (71, 1809380), (142, 904690), (284, 452345), (355, 361876), (710, 180938), (1420, 90469)]