21354987

素因数分解:

$3^1\times {\mathrm{83}}^1\times {\mathrm{139}}^1\times {\mathrm{617}}^1$

素因数の和:842

約数の個数: 16

約数和(自身を含む): 29070720

約数和(自身を除く): 7715733

約数列:

[1, 3, 83, 139, 249, 417, 617, 1851, 11537, 34611, 51211, 85763, 153633, 257289, 7118329, 21354987]

約数ペア:

[(1, 21354987), (3, 7118329), (83, 257289), (139, 153633), (249, 85763), (417, 51211), (617, 34611), (1851, 11537)]