19939205

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{353}}^1$

素因数の和:461

約数の個数: 32

約数和(自身を含む): 28546560

約数和(自身を除く): 8607355

約数列:

[1, 5, 11, 13, 55, 65, 79, 143, 353, 395, 715, 869, 1027, 1765, 3883, 4345, 4589, 5135, 11297, 19415, 22945, 27887, 50479, 56485, 139435, 252395, 306757, 362531, 1533785, 1812655, 3987841, 19939205]

約数ペア:

[(1, 19939205), (5, 3987841), (11, 1812655), (13, 1533785), (55, 362531), (65, 306757), (79, 252395), (143, 139435), (353, 56485), (395, 50479), (715, 27887), (869, 22945), (1027, 19415), (1765, 11297), (3883, 5135), (4345, 4589)]