21664045

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{337}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 29981952

約数和(自身を除く): 8317907

約数列:

[1, 5, 13, 23, 43, 65, 115, 215, 299, 337, 559, 989, 1495, 1685, 2795, 4381, 4945, 7751, 12857, 14491, 21905, 38755, 64285, 72455, 100763, 188383, 333293, 503815, 941915, 1666465, 4332809, 21664045]

約数ペア:

[(1, 21664045), (5, 4332809), (13, 1666465), (23, 941915), (43, 503815), (65, 333293), (115, 188383), (215, 100763), (299, 72455), (337, 64285), (559, 38755), (989, 21905), (1495, 14491), (1685, 12857), (2795, 7751), (4381, 4945)]