20177740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2237}}^1$

素因数の和:2298

約数の個数: 48

約数和(自身を含む): 47373984

約数和(自身を除く): 27196244

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 410, 451, 820, 902, 1804, 2237, 2255, 4474, 4510, 8948, 9020, 11185, 22370, 24607, 44740, 49214, 91717, 98428, 123035, 183434, 246070, 366868, 458585, 492140, 917170, 1008887, 1834340, 2017774, 4035548, 5044435, 10088870, 20177740]

約数ペア:

[(1, 20177740), (2, 10088870), (4, 5044435), (5, 4035548), (10, 2017774), (11, 1834340), (20, 1008887), (22, 917170), (41, 492140), (44, 458585), (55, 366868), (82, 246070), (110, 183434), (164, 123035), (205, 98428), (220, 91717), (410, 49214), (451, 44740), (820, 24607), (902, 22370), (1804, 11185), (2237, 9020), (2255, 8948), (4474, 4510)]