81728360

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{291887}}^1$

素因数の和:291905

約数の個数: 32

約数和(自身を含む): 210159360

約数和(自身を除く): 128431000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 291887, 583774, 1167548, 1459435, 2043209, 2335096, 2918870, 4086418, 5837740, 8172836, 10216045, 11675480, 16345672, 20432090, 40864180, 81728360]

約数ペア:

[(1, 81728360), (2, 40864180), (4, 20432090), (5, 16345672), (7, 11675480), (8, 10216045), (10, 8172836), (14, 5837740), (20, 4086418), (28, 2918870), (35, 2335096), (40, 2043209), (56, 1459435), (70, 1167548), (140, 583774), (280, 291887)]