21210365

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20297}}^1$

素因数の和:20332

約数の個数: 16

約数和(自身を含む): 29229120

約数和(自身を除く): 8018755

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20297, 101485, 223267, 385643, 1116335, 1928215, 4242073, 21210365]

約数ペア:

[(1, 21210365), (5, 4242073), (11, 1928215), (19, 1116335), (55, 385643), (95, 223267), (209, 101485), (1045, 20297)]