21288688

素因数分解:

$2^4\times {\mathrm{173}}^1\times {\mathrm{7691}}^1$

素因数の和:7872

約数の個数: 20

約数和(自身を含む): 41490648

約数和(自身を除く): 20201960

約数列:

[1, 2, 4, 8, 16, 173, 346, 692, 1384, 2768, 7691, 15382, 30764, 61528, 123056, 1330543, 2661086, 5322172, 10644344, 21288688]

約数ペア:

[(1, 21288688), (2, 10644344), (4, 5322172), (8, 2661086), (16, 1330543), (173, 123056), (346, 61528), (692, 30764), (1384, 15382), (2768, 7691)]