20426480

素因数分解:

$2^4\times 5^1\times {\mathrm{311}}^1\times {\mathrm{821}}^1$

素因数の和:1145

約数の個数: 40

約数和(自身を含む): 47702304

約数和(自身を除く): 27275824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 311, 622, 821, 1244, 1555, 1642, 2488, 3110, 3284, 4105, 4976, 6220, 6568, 8210, 12440, 13136, 16420, 24880, 32840, 65680, 255331, 510662, 1021324, 1276655, 2042648, 2553310, 4085296, 5106620, 10213240, 20426480]

約数ペア:

[(1, 20426480), (2, 10213240), (4, 5106620), (5, 4085296), (8, 2553310), (10, 2042648), (16, 1276655), (20, 1021324), (40, 510662), (80, 255331), (311, 65680), (622, 32840), (821, 24880), (1244, 16420), (1555, 13136), (1642, 12440), (2488, 8210), (3110, 6568), (3284, 6220), (4105, 4976)]