20551419

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{619}}^1$

素因数の和:680

約数の個数: 48

約数和(自身を含む): 37140480

約数和(自身を除く): 16589061

約数列:

[1, 3, 7, 9, 17, 21, 31, 51, 63, 93, 119, 153, 217, 279, 357, 527, 619, 651, 1071, 1581, 1857, 1953, 3689, 4333, 4743, 5571, 10523, 11067, 12999, 19189, 31569, 33201, 38997, 57567, 73661, 94707, 134323, 172701, 220983, 326213, 402969, 662949, 978639, 1208907, 2283491, 2935917, 6850473, 20551419]

約数ペア:

[(1, 20551419), (3, 6850473), (7, 2935917), (9, 2283491), (17, 1208907), (21, 978639), (31, 662949), (51, 402969), (63, 326213), (93, 220983), (119, 172701), (153, 134323), (217, 94707), (279, 73661), (357, 57567), (527, 38997), (619, 33201), (651, 31569), (1071, 19189), (1581, 12999), (1857, 11067), (1953, 10523), (3689, 5571), (4333, 4743)]