20121285

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{4153}}^1$

素因数の和:4197

約数の個数: 32

約数和(自身を含む): 35890560

約数和(自身を除く): 15769275

約数列:

[1, 3, 5, 15, 17, 19, 51, 57, 85, 95, 255, 285, 323, 969, 1615, 4153, 4845, 12459, 20765, 62295, 70601, 78907, 211803, 236721, 353005, 394535, 1059015, 1183605, 1341419, 4024257, 6707095, 20121285]

約数ペア:

[(1, 20121285), (3, 6707095), (5, 4024257), (15, 1341419), (17, 1183605), (19, 1059015), (51, 394535), (57, 353005), (85, 236721), (95, 211803), (255, 78907), (285, 70601), (323, 62295), (969, 20765), (1615, 12459), (4153, 4845)]