20605520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19813}}^1$

素因数の和:19839

約数の個数: 40

約数和(自身を含む): 51595656

約数和(自身を除く): 30990136

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19813, 39626, 79252, 99065, 158504, 198130, 257569, 317008, 396260, 515138, 792520, 1030276, 1287845, 1585040, 2060552, 2575690, 4121104, 5151380, 10302760, 20605520]

約数ペア:

[(1, 20605520), (2, 10302760), (4, 5151380), (5, 4121104), (8, 2575690), (10, 2060552), (13, 1585040), (16, 1287845), (20, 1030276), (26, 792520), (40, 515138), (52, 396260), (65, 317008), (80, 257569), (104, 198130), (130, 158504), (208, 99065), (260, 79252), (520, 39626), (1040, 19813)]