21428890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{2861}}^1$

素因数の和:2982

約数の個数: 32

約数和(自身を含む): 44509824

約数和(自身を除く): 23080934

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 107, 214, 535, 749, 1070, 1498, 2861, 3745, 5722, 7490, 14305, 20027, 28610, 40054, 100135, 200270, 306127, 612254, 1530635, 2142889, 3061270, 4285778, 10714445, 21428890]

約数ペア:

[(1, 21428890), (2, 10714445), (5, 4285778), (7, 3061270), (10, 2142889), (14, 1530635), (35, 612254), (70, 306127), (107, 200270), (214, 100135), (535, 40054), (749, 28610), (1070, 20027), (1498, 14305), (2861, 7490), (3745, 5722)]