21808254

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{279593}}^1$

素因数の和:279611

約数の個数: 16

約数和(自身を含む): 46971792

約数和(自身を除く): 25163538

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 279593, 559186, 838779, 1677558, 3634709, 7269418, 10904127, 21808254]

約数ペア:

[(1, 21808254), (2, 10904127), (3, 7269418), (6, 3634709), (13, 1677558), (26, 838779), (39, 559186), (78, 279593)]