20638120

素因数分解:

$2^3\times 5^1\times {\mathrm{457}}^1\times {\mathrm{1129}}^1$

素因数の和:1597

約数の個数: 32

約数和(自身を含む): 46578600

約数和(自身を除く): 25940480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 457, 914, 1129, 1828, 2258, 2285, 3656, 4516, 4570, 5645, 9032, 9140, 11290, 18280, 22580, 45160, 515953, 1031906, 2063812, 2579765, 4127624, 5159530, 10319060, 20638120]

約数ペア:

[(1, 20638120), (2, 10319060), (4, 5159530), (5, 4127624), (8, 2579765), (10, 2063812), (20, 1031906), (40, 515953), (457, 45160), (914, 22580), (1129, 18280), (1828, 11290), (2258, 9140), (2285, 9032), (3656, 5645), (4516, 4570)]