20461400

素因数分解:

$2^3\times 5^2\times {\mathrm{263}}^1\times {\mathrm{389}}^1$

素因数の和:668

約数の個数: 48

約数和(自身を含む): 47876400

約数和(自身を除く): 27415000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 263, 389, 526, 778, 1052, 1315, 1556, 1945, 2104, 2630, 3112, 3890, 5260, 6575, 7780, 9725, 10520, 13150, 15560, 19450, 26300, 38900, 52600, 77800, 102307, 204614, 409228, 511535, 818456, 1023070, 2046140, 2557675, 4092280, 5115350, 10230700, 20461400]

約数ペア:

[(1, 20461400), (2, 10230700), (4, 5115350), (5, 4092280), (8, 2557675), (10, 2046140), (20, 1023070), (25, 818456), (40, 511535), (50, 409228), (100, 204614), (200, 102307), (263, 77800), (389, 52600), (526, 38900), (778, 26300), (1052, 19450), (1315, 15560), (1556, 13150), (1945, 10520), (2104, 9725), (2630, 7780), (3112, 6575), (3890, 5260)]