21319959

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:255

約数の個数: 32

約数和(自身を含む): 31046400

約数和(自身を除く): 9726441

約数列:

[1, 3, 29, 41, 43, 87, 123, 129, 139, 417, 1189, 1247, 1763, 3567, 3741, 4031, 5289, 5699, 5977, 12093, 17097, 17931, 51127, 153381, 165271, 173333, 245057, 495813, 519999, 735171, 7106653, 21319959]

約数ペア:

[(1, 21319959), (3, 7106653), (29, 735171), (41, 519999), (43, 495813), (87, 245057), (123, 173333), (129, 165271), (139, 153381), (417, 51127), (1189, 17931), (1247, 17097), (1763, 12093), (3567, 5977), (3741, 5699), (4031, 5289)]