21025263

素因数分解:

$3^1\times 7^2\times {\mathrm{281}}^1\times {\mathrm{509}}^1$

素因数の和:807

約数の個数: 24

約数和(自身を含む): 32790960

約数和(自身を除く): 11765697

約数列:

[1, 3, 7, 21, 49, 147, 281, 509, 843, 1527, 1967, 3563, 5901, 10689, 13769, 24941, 41307, 74823, 143029, 429087, 1001203, 3003609, 7008421, 21025263]

約数ペア:

[(1, 21025263), (3, 7008421), (7, 3003609), (21, 1001203), (49, 429087), (147, 143029), (281, 74823), (509, 41307), (843, 24941), (1527, 13769), (1967, 10689), (3563, 5901)]