64480720

素因数分解:

$2^4\times 5^1\times {\mathrm{806009}}^1$

素因数の和:806022

約数の個数: 20

約数和(自身を含む): 149917860

約数和(自身を除く): 85437140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 806009, 1612018, 3224036, 4030045, 6448072, 8060090, 12896144, 16120180, 32240360, 64480720]

約数ペア:

[(1, 64480720), (2, 32240360), (4, 16120180), (5, 12896144), (8, 8060090), (10, 6448072), (16, 4030045), (20, 3224036), (40, 1612018), (80, 806009)]