20387380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4127}}^1$

素因数の和:4168

約数の個数: 48

約数和(自身を含む): 48545280

約数和(自身を除く): 28157900

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4127, 4940, 8254, 16508, 20635, 41270, 53651, 78413, 82540, 107302, 156826, 214604, 268255, 313652, 392065, 536510, 784130, 1019369, 1073020, 1568260, 2038738, 4077476, 5096845, 10193690, 20387380]

約数ペア:

[(1, 20387380), (2, 10193690), (4, 5096845), (5, 4077476), (10, 2038738), (13, 1568260), (19, 1073020), (20, 1019369), (26, 784130), (38, 536510), (52, 392065), (65, 313652), (76, 268255), (95, 214604), (130, 156826), (190, 107302), (247, 82540), (260, 78413), (380, 53651), (494, 41270), (988, 20635), (1235, 16508), (2470, 8254), (4127, 4940)]