21638847

素因数分解:

$3^1\times {\mathrm{43}}^2\times {\mathrm{47}}^1\times {\mathrm{83}}^1$

素因数の和:219

約数の個数: 24

約数和(自身を含む): 30530304

約数和(自身を除く): 8891457

約数列:

[1, 3, 43, 47, 83, 129, 141, 249, 1849, 2021, 3569, 3901, 5547, 6063, 10707, 11703, 86903, 153467, 167743, 260709, 460401, 503229, 7212949, 21638847]

約数ペア:

[(1, 21638847), (3, 7212949), (43, 503229), (47, 460401), (83, 260709), (129, 167743), (141, 153467), (249, 86903), (1849, 11703), (2021, 10707), (3569, 6063), (3901, 5547)]