19977808

素因数分解:

$2^4\times {\mathrm{491}}^1\times {\mathrm{2543}}^1$

素因数の和:3042

約数の個数: 20

約数和(自身を含む): 38801088

約数和(自身を除く): 18823280

約数列:

[1, 2, 4, 8, 16, 491, 982, 1964, 2543, 3928, 5086, 7856, 10172, 20344, 40688, 1248613, 2497226, 4994452, 9988904, 19977808]

約数ペア:

[(1, 19977808), (2, 9988904), (4, 4994452), (8, 2497226), (16, 1248613), (491, 40688), (982, 20344), (1964, 10172), (2543, 7856), (3928, 5086)]