20338220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{2741}}^1$

素因数の和:2810

約数の個数: 48

約数和(自身を含む): 49750848

約数和(自身を除く): 29412628

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 53, 70, 106, 140, 212, 265, 371, 530, 742, 1060, 1484, 1855, 2741, 3710, 5482, 7420, 10964, 13705, 19187, 27410, 38374, 54820, 76748, 95935, 145273, 191870, 290546, 383740, 581092, 726365, 1016911, 1452730, 2033822, 2905460, 4067644, 5084555, 10169110, 20338220]

約数ペア:

[(1, 20338220), (2, 10169110), (4, 5084555), (5, 4067644), (7, 2905460), (10, 2033822), (14, 1452730), (20, 1016911), (28, 726365), (35, 581092), (53, 383740), (70, 290546), (106, 191870), (140, 145273), (212, 95935), (265, 76748), (371, 54820), (530, 38374), (742, 27410), (1060, 19187), (1484, 13705), (1855, 10964), (2741, 7420), (3710, 5482)]