19981580

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{733}}^1$

素因数の和:818

約数の個数: 48

約数和(自身を含む): 44392320

約数和(自身を除く): 24410740

約数列:

[1, 2, 4, 5, 10, 20, 29, 47, 58, 94, 116, 145, 188, 235, 290, 470, 580, 733, 940, 1363, 1466, 2726, 2932, 3665, 5452, 6815, 7330, 13630, 14660, 21257, 27260, 34451, 42514, 68902, 85028, 106285, 137804, 172255, 212570, 344510, 425140, 689020, 999079, 1998158, 3996316, 4995395, 9990790, 19981580]

約数ペア:

[(1, 19981580), (2, 9990790), (4, 4995395), (5, 3996316), (10, 1998158), (20, 999079), (29, 689020), (47, 425140), (58, 344510), (94, 212570), (116, 172255), (145, 137804), (188, 106285), (235, 85028), (290, 68902), (470, 42514), (580, 34451), (733, 27260), (940, 21257), (1363, 14660), (1466, 13630), (2726, 7330), (2932, 6815), (3665, 5452)]