21378190

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{27061}}^1$

素因数の和:27147

約数の個数: 16

約数和(自身を含む): 38969280

約数和(自身を除く): 17591090

約数列:

[1, 2, 5, 10, 79, 158, 395, 790, 27061, 54122, 135305, 270610, 2137819, 4275638, 10689095, 21378190]

約数ペア:

[(1, 21378190), (2, 10689095), (5, 4275638), (10, 2137819), (79, 270610), (158, 135305), (395, 54122), (790, 27061)]