19988220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{47591}}^1$

素因数の和:47610

約数の個数: 48

約数和(自身を含む): 63963648

約数和(自身を除く): 43975428

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 47591, 95182, 142773, 190364, 237955, 285546, 333137, 475910, 571092, 666274, 713865, 951820, 999411, 1332548, 1427730, 1665685, 1998822, 2855460, 3331370, 3997644, 4997055, 6662740, 9994110, 19988220]

約数ペア:

[(1, 19988220), (2, 9994110), (3, 6662740), (4, 4997055), (5, 3997644), (6, 3331370), (7, 2855460), (10, 1998822), (12, 1665685), (14, 1427730), (15, 1332548), (20, 999411), (21, 951820), (28, 713865), (30, 666274), (35, 571092), (42, 475910), (60, 333137), (70, 285546), (84, 237955), (105, 190364), (140, 142773), (210, 95182), (420, 47591)]