28878928

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{138841}}^1$

素因数の和:138862

約数の個数: 20

約数和(自身を含む): 60257428

約数和(自身を除く): 31378500

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 138841, 277682, 555364, 1110728, 1804933, 2221456, 3609866, 7219732, 14439464, 28878928]

約数ペア:

[(1, 28878928), (2, 14439464), (4, 7219732), (8, 3609866), (13, 2221456), (16, 1804933), (26, 1110728), (52, 555364), (104, 277682), (208, 138841)]