20904793

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{431}}^1$

素因数の和:505

約数の個数: 24

約数和(自身を含む): 26562816

約数和(自身を除く): 5658023

約数列:

[1, 7, 13, 41, 91, 169, 287, 431, 533, 1183, 3017, 3731, 5603, 6929, 17671, 39221, 48503, 72839, 123697, 229723, 509873, 1608061, 2986399, 20904793]

約数ペア:

[(1, 20904793), (7, 2986399), (13, 1608061), (41, 509873), (91, 229723), (169, 123697), (287, 72839), (431, 48503), (533, 39221), (1183, 17671), (3017, 6929), (3731, 5603)]