20640010

素因数分解:

$2^1\times 5^1\times {\mathrm{631}}^1\times {\mathrm{3271}}^1$

素因数の和:3909

約数の個数: 16

約数和(自身を含む): 37222272

約数和(自身を除く): 16582262

約数列:

[1, 2, 5, 10, 631, 1262, 3155, 3271, 6310, 6542, 16355, 32710, 2064001, 4128002, 10320005, 20640010]

約数ペア:

[(1, 20640010), (2, 10320005), (5, 4128002), (10, 2064001), (631, 32710), (1262, 16355), (3155, 6542), (3271, 6310)]