21761289

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{503}}^1$

素因数の和:562

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 15978231

約数列:

[1, 3, 9, 11, 19, 23, 33, 57, 69, 99, 171, 207, 209, 253, 437, 503, 627, 759, 1311, 1509, 1881, 2277, 3933, 4527, 4807, 5533, 9557, 11569, 14421, 16599, 28671, 34707, 43263, 49797, 86013, 104121, 105127, 127259, 219811, 315381, 381777, 659433, 946143, 1145331, 1978299, 2417921, 7253763, 21761289]

約数ペア:

[(1, 21761289), (3, 7253763), (9, 2417921), (11, 1978299), (19, 1145331), (23, 946143), (33, 659433), (57, 381777), (69, 315381), (99, 219811), (171, 127259), (207, 105127), (209, 104121), (253, 86013), (437, 49797), (503, 43263), (627, 34707), (759, 28671), (1311, 16599), (1509, 14421), (1881, 11569), (2277, 9557), (3933, 5533), (4527, 4807)]