21084965

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20177}}^1$

素因数の和:20212

約数の個数: 16

約数和(自身を含む): 29056320

約数和(自身を除く): 7971355

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20177, 100885, 221947, 383363, 1109735, 1916815, 4216993, 21084965]

約数ペア:

[(1, 21084965), (5, 4216993), (11, 1916815), (19, 1109735), (55, 383363), (95, 221947), (209, 100885), (1045, 20177)]