21158540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4787}}^1$

素因数の和:4826

約数の個数: 48

約数和(自身を含む): 50676192

約数和(自身を除く): 29517652

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4787, 9574, 19148, 23935, 47870, 62231, 81379, 95740, 124462, 162758, 248924, 311155, 325516, 406895, 622310, 813790, 1057927, 1244620, 1627580, 2115854, 4231708, 5289635, 10579270, 21158540]

約数ペア:

[(1, 21158540), (2, 10579270), (4, 5289635), (5, 4231708), (10, 2115854), (13, 1627580), (17, 1244620), (20, 1057927), (26, 813790), (34, 622310), (52, 406895), (65, 325516), (68, 311155), (85, 248924), (130, 162758), (170, 124462), (221, 95740), (260, 81379), (340, 62231), (442, 47870), (884, 23935), (1105, 19148), (2210, 9574), (4420, 4787)]