21388003

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{3853}}^1$

素因数の和:3934

約数の個数: 16

約数和(自身を含む): 26762176

約数和(自身を除く): 5374173

約数列:

[1, 7, 13, 61, 91, 427, 793, 3853, 5551, 26971, 50089, 235033, 350623, 1645231, 3055429, 21388003]

約数ペア:

[(1, 21388003), (7, 3055429), (13, 1645231), (61, 350623), (91, 235033), (427, 50089), (793, 26971), (3853, 5551)]