81486140

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{25951}}^1$

素因数の和:26117

約数の個数: 24

約数和(自身を含む): 172217472

約数和(自身を除く): 90731332

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 25951, 51902, 103804, 129755, 259510, 519020, 4074307, 8148614, 16297228, 20371535, 40743070, 81486140]

約数ペア:

[(1, 81486140), (2, 40743070), (4, 20371535), (5, 16297228), (10, 8148614), (20, 4074307), (157, 519020), (314, 259510), (628, 129755), (785, 103804), (1570, 51902), (3140, 25951)]