19721745

素因数分解:

$3^3\times 5^1\times {\mathrm{347}}^1\times {\mathrm{421}}^1$

素因数の和:782

約数の個数: 32

約数和(自身を含む): 35245440

約数和(自身を除く): 15523695

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 347, 421, 1041, 1263, 1735, 2105, 3123, 3789, 5205, 6315, 9369, 11367, 15615, 18945, 46845, 56835, 146087, 438261, 730435, 1314783, 2191305, 3944349, 6573915, 19721745]

約数ペア:

[(1, 19721745), (3, 6573915), (5, 3944349), (9, 2191305), (15, 1314783), (27, 730435), (45, 438261), (135, 146087), (347, 56835), (421, 46845), (1041, 18945), (1263, 15615), (1735, 11367), (2105, 9369), (3123, 6315), (3789, 5205)]