12909156620

素因数分解:

$2^2\times 5^1\times {\mathrm{645457831}}^1$

素因数の和:645457840

約数の個数: 12

約数和(自身を含む): 27109228944

約数和(自身を除く): 14200072324

約数列:

[1, 2, 4, 5, 10, 20, 645457831, 1290915662, 2581831324, 3227289155, 6454578310, 12909156620]

約数ペア:

[(1, 12909156620), (2, 6454578310), (4, 3227289155), (5, 2581831324), (10, 1290915662), (20, 645457831)]