21981830

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{13007}}^1$

素因数の和:13040

約数の個数: 24

約数和(自身を含む): 42848352

約数和(自身を除く): 20866522

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 13007, 26014, 65035, 130070, 169091, 338182, 845455, 1690910, 2198183, 4396366, 10990915, 21981830]

約数ペア:

[(1, 21981830), (2, 10990915), (5, 4396366), (10, 2198183), (13, 1690910), (26, 845455), (65, 338182), (130, 169091), (169, 130070), (338, 65035), (845, 26014), (1690, 13007)]