21461080

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{5209}}^1$

素因数の和:5323

約数の個数: 32

約数和(自身を含む): 48765600

約数和(自身を除く): 27304520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 5209, 10418, 20836, 26045, 41672, 52090, 104180, 208360, 536527, 1073054, 2146108, 2682635, 4292216, 5365270, 10730540, 21461080]

約数ペア:

[(1, 21461080), (2, 10730540), (4, 5365270), (5, 4292216), (8, 2682635), (10, 2146108), (20, 1073054), (40, 536527), (103, 208360), (206, 104180), (412, 52090), (515, 41672), (824, 26045), (1030, 20836), (2060, 10418), (4120, 5209)]