20405220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{719}}^1$

素因数の和:785

約数の個数: 96

約数和(自身を含む): 63866880

約数和(自身を除く): 43461660

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 43, 44, 55, 60, 66, 86, 110, 129, 132, 165, 172, 215, 220, 258, 330, 430, 473, 516, 645, 660, 719, 860, 946, 1290, 1419, 1438, 1892, 2157, 2365, 2580, 2838, 2876, 3595, 4314, 4730, 5676, 7095, 7190, 7909, 8628, 9460, 10785, 14190, 14380, 15818, 21570, 23727, 28380, 30917, 31636, 39545, 43140, 47454, 61834, 79090, 92751, 94908, 118635, 123668, 154585, 158180, 185502, 237270, 309170, 340087, 371004, 463755, 474540, 618340, 680174, 927510, 1020261, 1360348, 1700435, 1855020, 2040522, 3400870, 4081044, 5101305, 6801740, 10202610, 20405220]

約数ペア:

[(1, 20405220), (2, 10202610), (3, 6801740), (4, 5101305), (5, 4081044), (6, 3400870), (10, 2040522), (11, 1855020), (12, 1700435), (15, 1360348), (20, 1020261), (22, 927510), (30, 680174), (33, 618340), (43, 474540), (44, 463755), (55, 371004), (60, 340087), (66, 309170), (86, 237270), (110, 185502), (129, 158180), (132, 154585), (165, 123668), (172, 118635), (215, 94908), (220, 92751), (258, 79090), (330, 61834), (430, 47454), (473, 43140), (516, 39545), (645, 31636), (660, 30917), (719, 28380), (860, 23727), (946, 21570), (1290, 15818), (1419, 14380), (1438, 14190), (1892, 10785), (2157, 9460), (2365, 8628), (2580, 7909), (2838, 7190), (2876, 7095), (3595, 5676), (4314, 4730)]