21808221

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{421}}^1\times {\mathrm{557}}^1$

素因数の和:1012

約数の個数: 16

約数和(自身を含む): 30140928

約数和(自身を除く): 8332707

約数列:

[1, 3, 31, 93, 421, 557, 1263, 1671, 13051, 17267, 39153, 51801, 234497, 703491, 7269407, 21808221]

約数ペア:

[(1, 21808221), (3, 7269407), (31, 703491), (93, 234497), (421, 51801), (557, 39153), (1263, 17267), (1671, 13051)]