20775580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4787}}^1$

素因数の和:4834

約数の個数: 48

約数和(自身を含む): 51480576

約数和(自身を除く): 30704996

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 620, 868, 1085, 2170, 4340, 4787, 9574, 19148, 23935, 33509, 47870, 67018, 95740, 134036, 148397, 167545, 296794, 335090, 593588, 670180, 741985, 1038779, 1483970, 2077558, 2967940, 4155116, 5193895, 10387790, 20775580]

約数ペア:

[(1, 20775580), (2, 10387790), (4, 5193895), (5, 4155116), (7, 2967940), (10, 2077558), (14, 1483970), (20, 1038779), (28, 741985), (31, 670180), (35, 593588), (62, 335090), (70, 296794), (124, 167545), (140, 148397), (155, 134036), (217, 95740), (310, 67018), (434, 47870), (620, 33509), (868, 23935), (1085, 19148), (2170, 9574), (4340, 4787)]