81255280

素因数分解:

$2^4\times 5^1\times {\mathrm{1015691}}^1$

素因数の和:1015704

約数の個数: 20

約数和(自身を含む): 188918712

約数和(自身を除く): 107663432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1015691, 2031382, 4062764, 5078455, 8125528, 10156910, 16251056, 20313820, 40627640, 81255280]

約数ペア:

[(1, 81255280), (2, 40627640), (4, 20313820), (5, 16251056), (8, 10156910), (10, 8125528), (16, 5078455), (20, 4062764), (40, 2031382), (80, 1015691)]