20784080

素因数分解:

$2^4\times 5^1\times {\mathrm{259801}}^1$

素因数の和:259814

約数の個数: 20

約数和(自身を含む): 48323172

約数和(自身を除く): 27539092

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 259801, 519602, 1039204, 1299005, 2078408, 2598010, 4156816, 5196020, 10392040, 20784080]

約数ペア:

[(1, 20784080), (2, 10392040), (4, 5196020), (5, 4156816), (8, 2598010), (10, 2078408), (16, 1299005), (20, 1039204), (40, 519602), (80, 259801)]