81910960

素因数分解:

$2^4\times 5^1\times {\mathrm{787}}^1\times {\mathrm{1301}}^1$

素因数の和:2101

約数の個数: 40

約数和(自身を含む): 190831536

約数和(自身を除く): 108920576

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 787, 1301, 1574, 2602, 3148, 3935, 5204, 6296, 6505, 7870, 10408, 12592, 13010, 15740, 20816, 26020, 31480, 52040, 62960, 104080, 1023887, 2047774, 4095548, 5119435, 8191096, 10238870, 16382192, 20477740, 40955480, 81910960]

約数ペア:

[(1, 81910960), (2, 40955480), (4, 20477740), (5, 16382192), (8, 10238870), (10, 8191096), (16, 5119435), (20, 4095548), (40, 2047774), (80, 1023887), (787, 104080), (1301, 62960), (1574, 52040), (2602, 31480), (3148, 26020), (3935, 20816), (5204, 15740), (6296, 13010), (6505, 12592), (7870, 10408)]