20680205

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{151}}^1$

素因数の和:226

約数の個数: 48

約数和(自身を含む): 32022144

約数和(自身を除く): 11341939

約数列:

[1, 5, 7, 13, 35, 43, 49, 65, 91, 151, 215, 245, 301, 455, 559, 637, 755, 1057, 1505, 1963, 2107, 2795, 3185, 3913, 5285, 6493, 7399, 9815, 10535, 13741, 19565, 27391, 32465, 36995, 45451, 68705, 84409, 96187, 136955, 227255, 318157, 422045, 480935, 590863, 1590785, 2954315, 4136041, 20680205]

約数ペア:

[(1, 20680205), (5, 4136041), (7, 2954315), (13, 1590785), (35, 590863), (43, 480935), (49, 422045), (65, 318157), (91, 227255), (151, 136955), (215, 96187), (245, 84409), (301, 68705), (455, 45451), (559, 36995), (637, 32465), (755, 27391), (1057, 19565), (1505, 13741), (1963, 10535), (2107, 9815), (2795, 7399), (3185, 6493), (3913, 5285)]