21325808

素因数分解:

$2^4\times 7^1\times {\mathrm{190409}}^1$

素因数の和:190424

約数の個数: 20

約数和(自身を含む): 47221680

約数和(自身を除く): 25895872

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 190409, 380818, 761636, 1332863, 1523272, 2665726, 3046544, 5331452, 10662904, 21325808]

約数ペア:

[(1, 21325808), (2, 10662904), (4, 5331452), (7, 3046544), (8, 2665726), (14, 1523272), (16, 1332863), (28, 761636), (56, 380818), (112, 190409)]