21918820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{331}}^1$

素因数の和:401

約数の個数: 96

約数和(自身を含む): 58899456

約数和(自身を除く): 36980636

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 43, 44, 55, 70, 77, 86, 110, 140, 154, 172, 215, 220, 301, 308, 331, 385, 430, 473, 602, 662, 770, 860, 946, 1204, 1324, 1505, 1540, 1655, 1892, 2317, 2365, 3010, 3310, 3311, 3641, 4634, 4730, 6020, 6620, 6622, 7282, 9268, 9460, 11585, 13244, 14233, 14564, 16555, 18205, 23170, 25487, 28466, 33110, 36410, 46340, 50974, 56932, 66220, 71165, 72820, 99631, 101948, 127435, 142330, 156563, 199262, 254870, 284660, 313126, 398524, 498155, 509740, 626252, 782815, 996310, 1095941, 1565630, 1992620, 2191882, 3131260, 4383764, 5479705, 10959410, 21918820]

約数ペア:

[(1, 21918820), (2, 10959410), (4, 5479705), (5, 4383764), (7, 3131260), (10, 2191882), (11, 1992620), (14, 1565630), (20, 1095941), (22, 996310), (28, 782815), (35, 626252), (43, 509740), (44, 498155), (55, 398524), (70, 313126), (77, 284660), (86, 254870), (110, 199262), (140, 156563), (154, 142330), (172, 127435), (215, 101948), (220, 99631), (301, 72820), (308, 71165), (331, 66220), (385, 56932), (430, 50974), (473, 46340), (602, 36410), (662, 33110), (770, 28466), (860, 25487), (946, 23170), (1204, 18205), (1324, 16555), (1505, 14564), (1540, 14233), (1655, 13244), (1892, 11585), (2317, 9460), (2365, 9268), (3010, 7282), (3310, 6622), (3311, 6620), (3641, 6020), (4634, 4730)]