21618429

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1\times {\mathrm{157}}^1$

素因数の和:329

約数の個数: 32

約数和(自身を含む): 33976320

約数和(自身を除く): 12357891

約数列:

[1, 3, 7, 21, 79, 83, 157, 237, 249, 471, 553, 581, 1099, 1659, 1743, 3297, 6557, 12403, 13031, 19671, 37209, 39093, 45899, 86821, 91217, 137697, 260463, 273651, 1029449, 3088347, 7206143, 21618429]

約数ペア:

[(1, 21618429), (3, 7206143), (7, 3088347), (21, 1029449), (79, 273651), (83, 260463), (157, 137697), (237, 91217), (249, 86821), (471, 45899), (553, 39093), (581, 37209), (1099, 19671), (1659, 13031), (1743, 12403), (3297, 6557)]