81268240

素因数分解:

$2^4\times 5^1\times {\mathrm{1015853}}^1$

素因数の和:1015866

約数の個数: 20

約数和(自身を含む): 188948844

約数和(自身を除く): 107680604

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1015853, 2031706, 4063412, 5079265, 8126824, 10158530, 16253648, 20317060, 40634120, 81268240]

約数ペア:

[(1, 81268240), (2, 40634120), (4, 20317060), (5, 16253648), (8, 10158530), (10, 8126824), (16, 5079265), (20, 4063412), (40, 2031706), (80, 1015853)]