21421540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{2887}}^1$

素因数の和:2956

約数の個数: 48

約数和(自身を含む): 52399872

約数和(自身を除く): 30978332

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, 2887, 3710, 5774, 7420, 11548, 14435, 20209, 28870, 40418, 57740, 80836, 101045, 153011, 202090, 306022, 404180, 612044, 765055, 1071077, 1530110, 2142154, 3060220, 4284308, 5355385, 10710770, 21421540]

約数ペア:

[(1, 21421540), (2, 10710770), (4, 5355385), (5, 4284308), (7, 3060220), (10, 2142154), (14, 1530110), (20, 1071077), (28, 765055), (35, 612044), (53, 404180), (70, 306022), (106, 202090), (140, 153011), (212, 101045), (265, 80836), (371, 57740), (530, 40418), (742, 28870), (1060, 20209), (1484, 14435), (1855, 11548), (2887, 7420), (3710, 5774)]