21782020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83777}}^1$

素因数の和:83799

約数の個数: 24

約数和(自身を含む): 49261464

約数和(自身を除く): 27479444

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 83777, 167554, 335108, 418885, 837770, 1089101, 1675540, 2178202, 4356404, 5445505, 10891010, 21782020]

約数ペア:

[(1, 21782020), (2, 10891010), (4, 5445505), (5, 4356404), (10, 2178202), (13, 1675540), (20, 1089101), (26, 837770), (52, 418885), (65, 335108), (130, 167554), (260, 83777)]