20407820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{193}}^1\times {\mathrm{311}}^1$

素因数の和:530

約数の個数: 48

約数和(自身を含む): 45759168

約数和(自身を除く): 25351348

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 193, 311, 340, 386, 622, 772, 965, 1244, 1555, 1930, 3110, 3281, 3860, 5287, 6220, 6562, 10574, 13124, 16405, 21148, 26435, 32810, 52870, 60023, 65620, 105740, 120046, 240092, 300115, 600230, 1020391, 1200460, 2040782, 4081564, 5101955, 10203910, 20407820]

約数ペア:

[(1, 20407820), (2, 10203910), (4, 5101955), (5, 4081564), (10, 2040782), (17, 1200460), (20, 1020391), (34, 600230), (68, 300115), (85, 240092), (170, 120046), (193, 105740), (311, 65620), (340, 60023), (386, 52870), (622, 32810), (772, 26435), (965, 21148), (1244, 16405), (1555, 13124), (1930, 10574), (3110, 6562), (3281, 6220), (3860, 5287)]