21271509

素因数分解:

$3^2\times 7^1\times {\mathrm{101}}^1\times {\mathrm{3343}}^1$

素因数の和:3457

約数の個数: 24

約数和(自身を含む): 35473152

約数和(自身を除く): 14201643

約数列:

[1, 3, 7, 9, 21, 63, 101, 303, 707, 909, 2121, 3343, 6363, 10029, 23401, 30087, 70203, 210609, 337643, 1012929, 2363501, 3038787, 7090503, 21271509]

約数ペア:

[(1, 21271509), (3, 7090503), (7, 3038787), (9, 2363501), (21, 1012929), (63, 337643), (101, 210609), (303, 70203), (707, 30087), (909, 23401), (2121, 10029), (3343, 6363)]