21829780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{241}}^1\times {\mathrm{647}}^1$

素因数の和:904

約数の個数: 48

約数和(自身を含む): 52690176

約数和(自身を除く): 30860396

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 241, 482, 647, 964, 1205, 1294, 1687, 2410, 2588, 3235, 3374, 4529, 4820, 6470, 6748, 8435, 9058, 12940, 16870, 18116, 22645, 33740, 45290, 90580, 155927, 311854, 623708, 779635, 1091489, 1559270, 2182978, 3118540, 4365956, 5457445, 10914890, 21829780]

約数ペア:

[(1, 21829780), (2, 10914890), (4, 5457445), (5, 4365956), (7, 3118540), (10, 2182978), (14, 1559270), (20, 1091489), (28, 779635), (35, 623708), (70, 311854), (140, 155927), (241, 90580), (482, 45290), (647, 33740), (964, 22645), (1205, 18116), (1294, 16870), (1687, 12940), (2410, 9058), (2588, 8435), (3235, 6748), (3374, 6470), (4529, 4820)]