21131272

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{155377}}^1$

素因数の和:155400

約数の個数: 16

約数和(自身を含む): 41952060

約数和(自身を除く): 20820788

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 155377, 310754, 621508, 1243016, 2641409, 5282818, 10565636, 21131272]

約数ペア:

[(1, 21131272), (2, 10565636), (4, 5282818), (8, 2641409), (17, 1243016), (34, 621508), (68, 310754), (136, 155377)]