21481047

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{647}}^1$

素因数の和:708

約数の個数: 48

約数和(自身を含む): 38817792

約数和(自身を除く): 17336745

約数列:

[1, 3, 7, 9, 17, 21, 31, 51, 63, 93, 119, 153, 217, 279, 357, 527, 647, 651, 1071, 1581, 1941, 1953, 3689, 4529, 4743, 5823, 10999, 11067, 13587, 20057, 32997, 33201, 40761, 60171, 76993, 98991, 140399, 180513, 230979, 340969, 421197, 692937, 1022907, 1263591, 2386783, 3068721, 7160349, 21481047]

約数ペア:

[(1, 21481047), (3, 7160349), (7, 3068721), (9, 2386783), (17, 1263591), (21, 1022907), (31, 692937), (51, 421197), (63, 340969), (93, 230979), (119, 180513), (153, 140399), (217, 98991), (279, 76993), (357, 60171), (527, 40761), (647, 33201), (651, 32997), (1071, 20057), (1581, 13587), (1941, 11067), (1953, 10999), (3689, 5823), (4529, 4743)]