21216471

素因数分解:

$3^1\times {\mathrm{61}}^1\times {\mathrm{191}}^1\times {\mathrm{607}}^1$

素因数の和:862

約数の個数: 16

約数和(自身を含む): 28950528

約数和(自身を除く): 7734057

約数列:

[1, 3, 61, 183, 191, 573, 607, 1821, 11651, 34953, 37027, 111081, 115937, 347811, 7072157, 21216471]

約数ペア:

[(1, 21216471), (3, 7072157), (61, 347811), (183, 115937), (191, 111081), (573, 37027), (607, 34953), (1821, 11651)]