21803481

素因数分解:

$3^2\times 7^4\times {\mathrm{1009}}^1$

素因数の和:1043

約数の個数: 30

約数和(自身を含む): 36777130

約数和(自身を除く): 14973649

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 1009, 1029, 2401, 3027, 3087, 7063, 7203, 9081, 21189, 21609, 49441, 63567, 148323, 346087, 444969, 1038261, 2422609, 3114783, 7267827, 21803481]

約数ペア:

[(1, 21803481), (3, 7267827), (7, 3114783), (9, 2422609), (21, 1038261), (49, 444969), (63, 346087), (147, 148323), (343, 63567), (441, 49441), (1009, 21609), (1029, 21189), (2401, 9081), (3027, 7203), (3087, 7063)]