20645500

素因数分解:

$2^2\times 5^3\times {\mathrm{157}}^1\times {\mathrm{263}}^1$

素因数の和:439

約数の個数: 48

約数和(自身を含む): 45549504

約数和(自身を除く): 24904004

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 157, 250, 263, 314, 500, 526, 628, 785, 1052, 1315, 1570, 2630, 3140, 3925, 5260, 6575, 7850, 13150, 15700, 19625, 26300, 32875, 39250, 41291, 65750, 78500, 82582, 131500, 165164, 206455, 412910, 825820, 1032275, 2064550, 4129100, 5161375, 10322750, 20645500]

約数ペア:

[(1, 20645500), (2, 10322750), (4, 5161375), (5, 4129100), (10, 2064550), (20, 1032275), (25, 825820), (50, 412910), (100, 206455), (125, 165164), (157, 131500), (250, 82582), (263, 78500), (314, 65750), (500, 41291), (526, 39250), (628, 32875), (785, 26300), (1052, 19625), (1315, 15700), (1570, 13150), (2630, 7850), (3140, 6575), (3925, 5260)]