18757480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2161}}^1$

素因数の和:2210

約数の個数: 64

約数和(自身を含む): 49812480

約数和(自身を除く): 31055000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2161, 2170, 4322, 4340, 8644, 8680, 10805, 15127, 17288, 21610, 30254, 43220, 60508, 66991, 75635, 86440, 121016, 133982, 151270, 267964, 302540, 334955, 468937, 535928, 605080, 669910, 937874, 1339820, 1875748, 2344685, 2679640, 3751496, 4689370, 9378740, 18757480]

約数ペア:

[(1, 18757480), (2, 9378740), (4, 4689370), (5, 3751496), (7, 2679640), (8, 2344685), (10, 1875748), (14, 1339820), (20, 937874), (28, 669910), (31, 605080), (35, 535928), (40, 468937), (56, 334955), (62, 302540), (70, 267964), (124, 151270), (140, 133982), (155, 121016), (217, 86440), (248, 75635), (280, 66991), (310, 60508), (434, 43220), (620, 30254), (868, 21610), (1085, 17288), (1240, 15127), (1736, 10805), (2161, 8680), (2170, 8644), (4322, 4340)]