128974360

素因数分解:

$2^3\times 5^1\times {\mathrm{1279}}^1\times {\mathrm{2521}}^1$

素因数の和:3811

約数の個数: 32

約数和(自身を含む): 290534400

約数和(自身を除く): 161560040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1279, 2521, 2558, 5042, 5116, 6395, 10084, 10232, 12605, 12790, 20168, 25210, 25580, 50420, 51160, 100840, 3224359, 6448718, 12897436, 16121795, 25794872, 32243590, 64487180, 128974360]

約数ペア:

[(1, 128974360), (2, 64487180), (4, 32243590), (5, 25794872), (8, 16121795), (10, 12897436), (20, 6448718), (40, 3224359), (1279, 100840), (2521, 51160), (2558, 50420), (5042, 25580), (5116, 25210), (6395, 20168), (10084, 12790), (10232, 12605)]