21980770

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{193}}^1\times {\mathrm{1627}}^1$

素因数の和:1834

約数の個数: 32

約数和(自身を含む): 45479808

約数和(自身を除く): 23499038

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 193, 386, 965, 1351, 1627, 1930, 2702, 3254, 6755, 8135, 11389, 13510, 16270, 22778, 56945, 113890, 314011, 628022, 1570055, 2198077, 3140110, 4396154, 10990385, 21980770]

約数ペア:

[(1, 21980770), (2, 10990385), (5, 4396154), (7, 3140110), (10, 2198077), (14, 1570055), (35, 628022), (70, 314011), (193, 113890), (386, 56945), (965, 22778), (1351, 16270), (1627, 13510), (1930, 11389), (2702, 8135), (3254, 6755)]