20809940

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{2381}}^1$

素因数の和:2432

約数の個数: 48

約数和(自身を含む): 48021120

約数和(自身を除く): 27211180

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 38, 46, 76, 92, 95, 115, 190, 230, 380, 437, 460, 874, 1748, 2185, 2381, 4370, 4762, 8740, 9524, 11905, 23810, 45239, 47620, 54763, 90478, 109526, 180956, 219052, 226195, 273815, 452390, 547630, 904780, 1040497, 1095260, 2080994, 4161988, 5202485, 10404970, 20809940]

約数ペア:

[(1, 20809940), (2, 10404970), (4, 5202485), (5, 4161988), (10, 2080994), (19, 1095260), (20, 1040497), (23, 904780), (38, 547630), (46, 452390), (76, 273815), (92, 226195), (95, 219052), (115, 180956), (190, 109526), (230, 90478), (380, 54763), (437, 47620), (460, 45239), (874, 23810), (1748, 11905), (2185, 9524), (2381, 8740), (4370, 4762)]