20971540

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61681}}^1$

素因数の和:61707

約数の個数: 24

約数和(自身を含む): 46631592

約数和(自身を除く): 25660052

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 61681, 123362, 246724, 308405, 616810, 1048577, 1233620, 2097154, 4194308, 5242885, 10485770, 20971540]

約数ペア:

[(1, 20971540), (2, 10485770), (4, 5242885), (5, 4194308), (10, 2097154), (17, 1233620), (20, 1048577), (34, 616810), (68, 308405), (85, 246724), (170, 123362), (340, 61681)]