21261821

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{3221}}^1$

素因数の和:3292

約数の個数: 16

約数和(自身を含む): 25982208

約数和(自身を除く): 4720387

約数列:

[1, 7, 23, 41, 161, 287, 943, 3221, 6601, 22547, 74083, 132061, 518581, 924427, 3037403, 21261821]

約数ペア:

[(1, 21261821), (7, 3037403), (23, 924427), (41, 518581), (161, 132061), (287, 74083), (943, 22547), (3221, 6601)]