21709723

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{151}}^1$

素因数の和:247

約数の個数: 32

約数和(自身を含む): 28016640

約数和(自身を除く): 6306917

約数列:

[1, 7, 19, 23, 47, 133, 151, 161, 329, 437, 893, 1057, 1081, 2869, 3059, 3473, 6251, 7097, 7567, 20083, 20539, 24311, 49679, 65987, 134843, 143773, 163231, 461909, 943901, 1142617, 3101389, 21709723]

約数ペア:

[(1, 21709723), (7, 3101389), (19, 1142617), (23, 943901), (47, 461909), (133, 163231), (151, 143773), (161, 134843), (329, 65987), (437, 49679), (893, 24311), (1057, 20539), (1081, 20083), (2869, 7567), (3059, 7097), (3473, 6251)]