19439980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{191}}^1\times {\mathrm{727}}^1$

素因数の和:934

約数の個数: 48

約数和(自身を含む): 46964736

約数和(自身を除く): 27524756

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 191, 382, 727, 764, 955, 1337, 1454, 1910, 2674, 2908, 3635, 3820, 5089, 5348, 6685, 7270, 10178, 13370, 14540, 20356, 25445, 26740, 50890, 101780, 138857, 277714, 555428, 694285, 971999, 1388570, 1943998, 2777140, 3887996, 4859995, 9719990, 19439980]

約数ペア:

[(1, 19439980), (2, 9719990), (4, 4859995), (5, 3887996), (7, 2777140), (10, 1943998), (14, 1388570), (20, 971999), (28, 694285), (35, 555428), (70, 277714), (140, 138857), (191, 101780), (382, 50890), (727, 26740), (764, 25445), (955, 20356), (1337, 14540), (1454, 13370), (1910, 10178), (2674, 7270), (2908, 6685), (3635, 5348), (3820, 5089)]