81425360

素因数分解:

$2^4\times 5^1\times {\mathrm{1017817}}^1$

素因数の和:1017830

約数の個数: 20

約数和(自身を含む): 189314148

約数和(自身を除く): 107888788

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1017817, 2035634, 4071268, 5089085, 8142536, 10178170, 16285072, 20356340, 40712680, 81425360]

約数ペア:

[(1, 81425360), (2, 40712680), (4, 20356340), (5, 16285072), (8, 10178170), (10, 8142536), (16, 5089085), (20, 4071268), (40, 2035634), (80, 1017817)]