18863540

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{509}}^1$

素因数の和:644

約数の個数: 48

約数和(自身を含む): 42411600

約数和(自身を除く): 23548060

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 109, 170, 218, 340, 436, 509, 545, 1018, 1090, 1853, 2036, 2180, 2545, 3706, 5090, 7412, 8653, 9265, 10180, 17306, 18530, 34612, 37060, 43265, 55481, 86530, 110962, 173060, 221924, 277405, 554810, 943177, 1109620, 1886354, 3772708, 4715885, 9431770, 18863540]

約数ペア:

[(1, 18863540), (2, 9431770), (4, 4715885), (5, 3772708), (10, 1886354), (17, 1109620), (20, 943177), (34, 554810), (68, 277405), (85, 221924), (109, 173060), (170, 110962), (218, 86530), (340, 55481), (436, 43265), (509, 37060), (545, 34612), (1018, 18530), (1090, 17306), (1853, 10180), (2036, 9265), (2180, 8653), (2545, 7412), (3706, 5090)]