20378345

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{317}}^1$

素因数の和:401

約数の個数: 32

約数和(自身を含む): 28207872

約数和(自身を除く): 7829527

約数列:

[1, 5, 13, 23, 43, 65, 115, 215, 299, 317, 559, 989, 1495, 1585, 2795, 4121, 4945, 7291, 12857, 13631, 20605, 36455, 64285, 68155, 94783, 177203, 313513, 473915, 886015, 1567565, 4075669, 20378345]

約数ペア:

[(1, 20378345), (5, 4075669), (13, 1567565), (23, 886015), (43, 473915), (65, 313513), (115, 177203), (215, 94783), (299, 68155), (317, 64285), (559, 36455), (989, 20605), (1495, 13631), (1585, 12857), (2795, 7291), (4121, 4945)]