21408903

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{239}}^1\times {\mathrm{269}}^1$

素因数の和:551

約数の個数: 24

約数和(自身を含む): 32011200

約数和(自身を除く): 10602297

約数列:

[1, 3, 9, 37, 111, 239, 269, 333, 717, 807, 2151, 2421, 8843, 9953, 26529, 29859, 64291, 79587, 89577, 192873, 578619, 2378767, 7136301, 21408903]

約数ペア:

[(1, 21408903), (3, 7136301), (9, 2378767), (37, 578619), (111, 192873), (239, 89577), (269, 79587), (333, 64291), (717, 29859), (807, 26529), (2151, 9953), (2421, 8843)]