19980380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{3319}}^1$

素因数の和:3378

約数の個数: 48

約数和(自身を含む): 49082880

約数和(自身を除く): 29102500

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 70, 86, 140, 172, 215, 301, 430, 602, 860, 1204, 1505, 3010, 3319, 6020, 6638, 13276, 16595, 23233, 33190, 46466, 66380, 92932, 116165, 142717, 232330, 285434, 464660, 570868, 713585, 999019, 1427170, 1998038, 2854340, 3996076, 4995095, 9990190, 19980380]

約数ペア:

[(1, 19980380), (2, 9990190), (4, 4995095), (5, 3996076), (7, 2854340), (10, 1998038), (14, 1427170), (20, 999019), (28, 713585), (35, 570868), (43, 464660), (70, 285434), (86, 232330), (140, 142717), (172, 116165), (215, 92932), (301, 66380), (430, 46466), (602, 33190), (860, 23233), (1204, 16595), (1505, 13276), (3010, 6638), (3319, 6020)]