20935280

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{2591}}^1$

素因数の和:2705

約数の個数: 40

約数和(自身を含む): 49175424

約数和(自身を除く): 28240144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 2020, 2591, 4040, 5182, 8080, 10364, 12955, 20728, 25910, 41456, 51820, 103640, 207280, 261691, 523382, 1046764, 1308455, 2093528, 2616910, 4187056, 5233820, 10467640, 20935280]

約数ペア:

[(1, 20935280), (2, 10467640), (4, 5233820), (5, 4187056), (8, 2616910), (10, 2093528), (16, 1308455), (20, 1046764), (40, 523382), (80, 261691), (101, 207280), (202, 103640), (404, 51820), (505, 41456), (808, 25910), (1010, 20728), (1616, 12955), (2020, 10364), (2591, 8080), (4040, 5182)]