21782780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{64067}}^1$

素因数の和:64093

約数の個数: 24

約数和(自身を含む): 48435408

約数和(自身を除く): 26652628

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 64067, 128134, 256268, 320335, 640670, 1089139, 1281340, 2178278, 4356556, 5445695, 10891390, 21782780]

約数ペア:

[(1, 21782780), (2, 10891390), (4, 5445695), (5, 4356556), (10, 2178278), (17, 1281340), (20, 1089139), (34, 640670), (68, 320335), (85, 256268), (170, 128134), (340, 64067)]