20403765

素因数分解:

$3^3\times 5^1\times {\mathrm{359}}^1\times {\mathrm{421}}^1$

素因数の和:794

約数の個数: 32

約数和(自身を含む): 36460800

約数和(自身を除く): 16057035

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 359, 421, 1077, 1263, 1795, 2105, 3231, 3789, 5385, 6315, 9693, 11367, 16155, 18945, 48465, 56835, 151139, 453417, 755695, 1360251, 2267085, 4080753, 6801255, 20403765]

約数ペア:

[(1, 20403765), (3, 6801255), (5, 4080753), (9, 2267085), (15, 1360251), (27, 755695), (45, 453417), (135, 151139), (359, 56835), (421, 48465), (1077, 18945), (1263, 16155), (1795, 11367), (2105, 9693), (3231, 6315), (3789, 5385)]