21285020

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{62603}}^1$

素因数の和:62629

約数の個数: 24

約数和(自身を含む): 47328624

約数和(自身を除く): 26043604

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 62603, 125206, 250412, 313015, 626030, 1064251, 1252060, 2128502, 4257004, 5321255, 10642510, 21285020]

約数ペア:

[(1, 21285020), (2, 10642510), (4, 5321255), (5, 4257004), (10, 2128502), (17, 1252060), (20, 1064251), (34, 626030), (68, 313015), (85, 250412), (170, 125206), (340, 62603)]