81301630

素因数分解:

$2^1\times 5^1\times {\mathrm{397}}^1\times {\mathrm{20479}}^1$

素因数の和:20883

約数の個数: 16

約数和(自身を含む): 146718720

約数和(自身を除く): 65417090

約数列:

[1, 2, 5, 10, 397, 794, 1985, 3970, 20479, 40958, 102395, 204790, 8130163, 16260326, 40650815, 81301630]

約数ペア:

[(1, 81301630), (2, 40650815), (5, 16260326), (10, 8130163), (397, 204790), (794, 102395), (1985, 40958), (3970, 20479)]