81813440

素因数分解:

$2^6\times 5^1\times {\mathrm{255667}}^1$

素因数の和:255684

約数の個数: 28

約数和(自身を含む): 194819016

約数和(自身を除く): 113005576

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 255667, 511334, 1022668, 1278335, 2045336, 2556670, 4090672, 5113340, 8181344, 10226680, 16362688, 20453360, 40906720, 81813440]

約数ペア:

[(1, 81813440), (2, 40906720), (4, 20453360), (5, 16362688), (8, 10226680), (10, 8181344), (16, 5113340), (20, 4090672), (32, 2556670), (40, 2045336), (64, 1278335), (80, 1022668), (160, 511334), (320, 255667)]