20999745

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{35897}}^1$

素因数の和:35921

約数の個数: 24

約数和(自身を含む): 39200616

約数和(自身を除く): 18200871

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 195, 585, 35897, 107691, 179485, 323073, 466661, 538455, 1399983, 1615365, 2333305, 4199949, 6999915, 20999745]

約数ペア:

[(1, 20999745), (3, 6999915), (5, 4199949), (9, 2333305), (13, 1615365), (15, 1399983), (39, 538455), (45, 466661), (65, 323073), (117, 179485), (195, 107691), (585, 35897)]