20345720

素因数分解:

$2^3\times 5^1\times {\mathrm{508643}}^1$

素因数の和:508654

約数の個数: 16

約数和(自身を含む): 45777960

約数和(自身を除く): 25432240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 508643, 1017286, 2034572, 2543215, 4069144, 5086430, 10172860, 20345720]

約数ペア:

[(1, 20345720), (2, 10172860), (4, 5086430), (5, 4069144), (8, 2543215), (10, 2034572), (20, 1017286), (40, 508643)]