21256870

素因数分解:

$2^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{787}}^1$

素因数の和:904

約数の個数: 32

約数和(自身を含む): 39885408

約数和(自身を除く): 18628538

約数列:

[1, 2, 5, 10, 37, 73, 74, 146, 185, 365, 370, 730, 787, 1574, 2701, 3935, 5402, 7870, 13505, 27010, 29119, 57451, 58238, 114902, 145595, 287255, 291190, 574510, 2125687, 4251374, 10628435, 21256870]

約数ペア:

[(1, 21256870), (2, 10628435), (5, 4251374), (10, 2125687), (37, 574510), (73, 291190), (74, 287255), (146, 145595), (185, 114902), (365, 58238), (370, 57451), (730, 29119), (787, 27010), (1574, 13505), (2701, 7870), (3935, 5402)]