21264145

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{199}}^1$

素因数の和:325

約数の個数: 32

約数和(自身を含む): 30412800

約数和(自身を除く): 9148655

約数列:

[1, 5, 7, 35, 43, 71, 199, 215, 301, 355, 497, 995, 1393, 1505, 2485, 3053, 6965, 8557, 14129, 15265, 21371, 42785, 59899, 70645, 98903, 106855, 299495, 494515, 607547, 3037735, 4252829, 21264145]

約数ペア:

[(1, 21264145), (5, 4252829), (7, 3037735), (35, 607547), (43, 494515), (71, 299495), (199, 106855), (215, 98903), (301, 70645), (355, 59899), (497, 42785), (995, 21371), (1393, 15265), (1505, 14129), (2485, 8557), (3053, 6965)]