21056769

素因数分解:

$3^2\times {\mathrm{19}}^2\times {\mathrm{6481}}^1$

素因数の和:6525

約数の個数: 18

約数和(自身を含む): 32105346

約数和(自身を除く): 11048577

約数列:

[1, 3, 9, 19, 57, 171, 361, 1083, 3249, 6481, 19443, 58329, 123139, 369417, 1108251, 2339641, 7018923, 21056769]

約数ペア:

[(1, 21056769), (3, 7018923), (9, 2339641), (19, 1108251), (57, 369417), (171, 123139), (361, 58329), (1083, 19443), (3249, 6481)]