21787479

素因数分解:

$3^2\times 7^1\times {\mathrm{239}}^1\times {\mathrm{1447}}^1$

素因数の和:1699

約数の個数: 24

約数和(自身を含む): 36142080

約数和(自身を除く): 14354601

約数列:

[1, 3, 7, 9, 21, 63, 239, 717, 1447, 1673, 2151, 4341, 5019, 10129, 13023, 15057, 30387, 91161, 345833, 1037499, 2420831, 3112497, 7262493, 21787479]

約数ペア:

[(1, 21787479), (3, 7262493), (7, 3112497), (9, 2420831), (21, 1037499), (63, 345833), (239, 91161), (717, 30387), (1447, 15057), (1673, 13023), (2151, 10129), (4341, 5019)]