20996717

素因数分解:

$7^1\times {\mathrm{17}}^2\times {\mathrm{97}}^1\times {\mathrm{107}}^1$

素因数の和:245

約数の個数: 24

約数和(自身を含む): 25994304

約数和(自身を除く): 4997587

約数列:

[1, 7, 17, 97, 107, 119, 289, 679, 749, 1649, 1819, 2023, 10379, 11543, 12733, 28033, 30923, 72653, 176443, 196231, 216461, 1235101, 2999531, 20996717]

約数ペア:

[(1, 20996717), (7, 2999531), (17, 1235101), (97, 216461), (107, 196231), (119, 176443), (289, 72653), (679, 30923), (749, 28033), (1649, 12733), (1819, 11543), (2023, 10379)]