21408165

素因数分解:

$3^3\times 5^1\times {\mathrm{347}}^1\times {\mathrm{457}}^1$

素因数の和:818

約数の個数: 32

約数和(自身を含む): 38252160

約数和(自身を除く): 16843995

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 347, 457, 1041, 1371, 1735, 2285, 3123, 4113, 5205, 6855, 9369, 12339, 15615, 20565, 46845, 61695, 158579, 475737, 792895, 1427211, 2378685, 4281633, 7136055, 21408165]

約数ペア:

[(1, 21408165), (3, 7136055), (5, 4281633), (9, 2378685), (15, 1427211), (27, 792895), (45, 475737), (135, 158579), (347, 61695), (457, 46845), (1041, 20565), (1371, 15615), (1735, 12339), (2285, 9369), (3123, 6855), (4113, 5205)]