21670490

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{27431}}^1$

素因数の和:27517

約数の個数: 16

約数和(自身を含む): 39502080

約数和(自身を除く): 17831590

約数列:

[1, 2, 5, 10, 79, 158, 395, 790, 27431, 54862, 137155, 274310, 2167049, 4334098, 10835245, 21670490]

約数ペア:

[(1, 21670490), (2, 10835245), (5, 4334098), (10, 2167049), (79, 274310), (158, 137155), (395, 54862), (790, 27431)]