21637240

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{4787}}^1$

素因数の和:4911

約数の個数: 32

約数和(自身を含む): 49124880

約数和(自身を除く): 27487640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 226, 452, 565, 904, 1130, 2260, 4520, 4787, 9574, 19148, 23935, 38296, 47870, 95740, 191480, 540931, 1081862, 2163724, 2704655, 4327448, 5409310, 10818620, 21637240]

約数ペア:

[(1, 21637240), (2, 10818620), (4, 5409310), (5, 4327448), (8, 2704655), (10, 2163724), (20, 1081862), (40, 540931), (113, 191480), (226, 95740), (452, 47870), (565, 38296), (904, 23935), (1130, 19148), (2260, 9574), (4520, 4787)]