21757365

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{239}}^1$

素因数の和:291

約数の個数: 72

約数和(自身を含む): 45976320

約数和(自身を除く): 24218955

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 63, 85, 105, 119, 153, 239, 255, 289, 315, 357, 595, 717, 765, 867, 1071, 1195, 1445, 1673, 1785, 2023, 2151, 2601, 3585, 4063, 4335, 5019, 5355, 6069, 8365, 10115, 10755, 12189, 13005, 15057, 18207, 20315, 25095, 28441, 30345, 36567, 60945, 69071, 75285, 85323, 91035, 142205, 182835, 207213, 255969, 345355, 426615, 483497, 621639, 1036065, 1279845, 1450491, 2417485, 3108195, 4351473, 7252455, 21757365]

約数ペア:

[(1, 21757365), (3, 7252455), (5, 4351473), (7, 3108195), (9, 2417485), (15, 1450491), (17, 1279845), (21, 1036065), (35, 621639), (45, 483497), (51, 426615), (63, 345355), (85, 255969), (105, 207213), (119, 182835), (153, 142205), (239, 91035), (255, 85323), (289, 75285), (315, 69071), (357, 60945), (595, 36567), (717, 30345), (765, 28441), (867, 25095), (1071, 20315), (1195, 18207), (1445, 15057), (1673, 13005), (1785, 12189), (2023, 10755), (2151, 10115), (2601, 8365), (3585, 6069), (4063, 5355), (4335, 5019)]