19916883

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{2377}}^1$

素因数の和:2416

約数の個数: 36

約数和(自身を含む): 35241960

約数和(自身を除く): 15325077

約数列:

[1, 3, 7, 9, 19, 21, 49, 57, 63, 133, 147, 171, 399, 441, 931, 1197, 2377, 2793, 7131, 8379, 16639, 21393, 45163, 49917, 116473, 135489, 149751, 316141, 349419, 406467, 948423, 1048257, 2212987, 2845269, 6638961, 19916883]

約数ペア:

[(1, 19916883), (3, 6638961), (7, 2845269), (9, 2212987), (19, 1048257), (21, 948423), (49, 406467), (57, 349419), (63, 316141), (133, 149751), (147, 135489), (171, 116473), (399, 49917), (441, 45163), (931, 21393), (1197, 16639), (2377, 8379), (2793, 7131)]