20999560

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{27631}}^1$

素因数の和:27661

約数の個数: 32

約数和(自身を含む): 49737600

約数和(自身を除く): 28738040

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 27631, 55262, 110524, 138155, 221048, 276310, 524989, 552620, 1049978, 1105240, 2099956, 2624945, 4199912, 5249890, 10499780, 20999560]

約数ペア:

[(1, 20999560), (2, 10499780), (4, 5249890), (5, 4199912), (8, 2624945), (10, 2099956), (19, 1105240), (20, 1049978), (38, 552620), (40, 524989), (76, 276310), (95, 221048), (152, 138155), (190, 110524), (380, 55262), (760, 27631)]