21085016

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{43207}}^1$

素因数の和:43274

約数の個数: 16

約数和(自身を含む): 40183440

約数和(自身を除く): 19098424

約数列:

[1, 2, 4, 8, 61, 122, 244, 488, 43207, 86414, 172828, 345656, 2635627, 5271254, 10542508, 21085016]

約数ペア:

[(1, 21085016), (2, 10542508), (4, 5271254), (8, 2635627), (61, 345656), (122, 172828), (244, 86414), (488, 43207)]