21263080

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7487}}^1$

素因数の和:7569

約数の個数: 32

約数和(自身を含む): 48522240

約数和(自身を除く): 27259160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7487, 14974, 29948, 37435, 59896, 74870, 149740, 299480, 531577, 1063154, 2126308, 2657885, 4252616, 5315770, 10631540, 21263080]

約数ペア:

[(1, 21263080), (2, 10631540), (4, 5315770), (5, 4252616), (8, 2657885), (10, 2126308), (20, 1063154), (40, 531577), (71, 299480), (142, 149740), (284, 74870), (355, 59896), (568, 37435), (710, 29948), (1420, 14974), (2840, 7487)]