21664769

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{137}}^1$

素因数の和:233

約数の個数: 32

約数和(自身を含む): 27820800

約数和(自身を除く): 6156031

約数列:

[1, 7, 19, 29, 41, 133, 137, 203, 287, 551, 779, 959, 1189, 2603, 3857, 3973, 5453, 5617, 8323, 18221, 22591, 27811, 39319, 75487, 106723, 158137, 162893, 528409, 747061, 1140251, 3094967, 21664769]

約数ペア:

[(1, 21664769), (7, 3094967), (19, 1140251), (29, 747061), (41, 528409), (133, 162893), (137, 158137), (203, 106723), (287, 75487), (551, 39319), (779, 27811), (959, 22591), (1189, 18221), (2603, 8323), (3857, 5617), (3973, 5453)]