16720605

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1987}}^1$

素因数の和:2026

約数の個数: 48

約数和(自身を含む): 33493824

約数和(自身を除く): 16773219

約数列:

[1, 3, 5, 9, 11, 15, 17, 33, 45, 51, 55, 85, 99, 153, 165, 187, 255, 495, 561, 765, 935, 1683, 1987, 2805, 5961, 8415, 9935, 17883, 21857, 29805, 33779, 65571, 89415, 101337, 109285, 168895, 196713, 304011, 327855, 371569, 506685, 983565, 1114707, 1520055, 1857845, 3344121, 5573535, 16720605]

約数ペア:

[(1, 16720605), (3, 5573535), (5, 3344121), (9, 1857845), (11, 1520055), (15, 1114707), (17, 983565), (33, 506685), (45, 371569), (51, 327855), (55, 304011), (85, 196713), (99, 168895), (153, 109285), (165, 101337), (187, 89415), (255, 65571), (495, 33779), (561, 29805), (765, 21857), (935, 17883), (1683, 9935), (1987, 8415), (2805, 5961)]