21086728

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{202757}}^1$

素因数の和:202776

約数の個数: 16

約数和(自身を含む): 42579180

約数和(自身を除く): 21492452

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 202757, 405514, 811028, 1622056, 2635841, 5271682, 10543364, 21086728]

約数ペア:

[(1, 21086728), (2, 10543364), (4, 5271682), (8, 2635841), (13, 1622056), (26, 811028), (52, 405514), (104, 202757)]