81091780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{4787}}^1$

素因数の和:4825

約数の個数: 72

約数和(自身を含む): 213966144

約数和(自身を除く): 132874364

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 121, 140, 154, 220, 242, 308, 385, 484, 605, 770, 847, 1210, 1540, 1694, 2420, 3388, 4235, 4787, 8470, 9574, 16940, 19148, 23935, 33509, 47870, 52657, 67018, 95740, 105314, 134036, 167545, 210628, 263285, 335090, 368599, 526570, 579227, 670180, 737198, 1053140, 1158454, 1474396, 1842995, 2316908, 2896135, 3685990, 4054589, 5792270, 7371980, 8109178, 11584540, 16218356, 20272945, 40545890, 81091780]

約数ペア:

[(1, 81091780), (2, 40545890), (4, 20272945), (5, 16218356), (7, 11584540), (10, 8109178), (11, 7371980), (14, 5792270), (20, 4054589), (22, 3685990), (28, 2896135), (35, 2316908), (44, 1842995), (55, 1474396), (70, 1158454), (77, 1053140), (110, 737198), (121, 670180), (140, 579227), (154, 526570), (220, 368599), (242, 335090), (308, 263285), (385, 210628), (484, 167545), (605, 134036), (770, 105314), (847, 95740), (1210, 67018), (1540, 52657), (1694, 47870), (2420, 33509), (3388, 23935), (4235, 19148), (4787, 16940), (8470, 9574)]