21391419

素因数分解:

$3^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{16699}}^1$

素因数の和:16770

約数の個数: 16

約数和(自身を含む): 33132800

約数和(自身を除く): 11741381

約数列:

[1, 3, 7, 21, 61, 183, 427, 1281, 16699, 50097, 116893, 350679, 1018639, 3055917, 7130473, 21391419]

約数ペア:

[(1, 21391419), (3, 7130473), (7, 3055917), (21, 1018639), (61, 350679), (183, 116893), (427, 50097), (1281, 16699)]