1800820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{677}}^1$

素因数の和:712

約数の個数: 48

約数和(自身を含む): 4556160

約数和(自身を除く): 2755340

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 677, 1330, 1354, 2660, 2708, 3385, 4739, 6770, 9478, 12863, 13540, 18956, 23695, 25726, 47390, 51452, 64315, 90041, 94780, 128630, 180082, 257260, 360164, 450205, 900410, 1800820]

約数ペア:

[(1, 1800820), (2, 900410), (4, 450205), (5, 360164), (7, 257260), (10, 180082), (14, 128630), (19, 94780), (20, 90041), (28, 64315), (35, 51452), (38, 47390), (70, 25726), (76, 23695), (95, 18956), (133, 13540), (140, 12863), (190, 9478), (266, 6770), (380, 4739), (532, 3385), (665, 2708), (677, 2660), (1330, 1354)]