20991240

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{58309}}^1$

素因数の和:58326

約数の個数: 48

約数和(自身を含む): 68222700

約数和(自身を除く): 47231460

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 180, 360, 58309, 116618, 174927, 233236, 291545, 349854, 466472, 524781, 583090, 699708, 874635, 1049562, 1166180, 1399416, 1749270, 2099124, 2332360, 2623905, 3498540, 4198248, 5247810, 6997080, 10495620, 20991240]

約数ペア:

[(1, 20991240), (2, 10495620), (3, 6997080), (4, 5247810), (5, 4198248), (6, 3498540), (8, 2623905), (9, 2332360), (10, 2099124), (12, 1749270), (15, 1399416), (18, 1166180), (20, 1049562), (24, 874635), (30, 699708), (36, 583090), (40, 524781), (45, 466472), (60, 349854), (72, 291545), (90, 233236), (120, 174927), (180, 116618), (360, 58309)]