31211240

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{4787}}^1$

素因数の和:4961

約数の個数: 32

約数和(自身を含む): 70670880

約数和(自身を除く): 39459640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3260, 4787, 6520, 9574, 19148, 23935, 38296, 47870, 95740, 191480, 780281, 1560562, 3121124, 3901405, 6242248, 7802810, 15605620, 31211240]

約数ペア:

[(1, 31211240), (2, 15605620), (4, 7802810), (5, 6242248), (8, 3901405), (10, 3121124), (20, 1560562), (40, 780281), (163, 191480), (326, 95740), (652, 47870), (815, 38296), (1304, 23935), (1630, 19148), (3260, 9574), (4787, 6520)]