20718990

素因数分解:

$2^1\times 3^4\times 5^1\times {\mathrm{25579}}^1$

素因数の和:25598

約数の個数: 40

約数和(自身を含む): 55713240

約数和(自身を除く): 34994250

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 270, 405, 810, 25579, 51158, 76737, 127895, 153474, 230211, 255790, 383685, 460422, 690633, 767370, 1151055, 1381266, 2071899, 2302110, 3453165, 4143798, 6906330, 10359495, 20718990]

約数ペア:

[(1, 20718990), (2, 10359495), (3, 6906330), (5, 4143798), (6, 3453165), (9, 2302110), (10, 2071899), (15, 1381266), (18, 1151055), (27, 767370), (30, 690633), (45, 460422), (54, 383685), (81, 255790), (90, 230211), (135, 153474), (162, 127895), (270, 76737), (405, 51158), (810, 25579)]