19638905

素因数分解:

$5^1\times {\mathrm{11}}^3\times {\mathrm{13}}^1\times {\mathrm{227}}^1$

素因数の和:278

約数の個数: 32

約数和(自身を含む): 28038528

約数和(自身を除く): 8399623

約数列:

[1, 5, 11, 13, 55, 65, 121, 143, 227, 605, 715, 1135, 1331, 1573, 2497, 2951, 6655, 7865, 12485, 14755, 17303, 27467, 32461, 86515, 137335, 162305, 302137, 357071, 1510685, 1785355, 3927781, 19638905]

約数ペア:

[(1, 19638905), (5, 3927781), (11, 1785355), (13, 1510685), (55, 357071), (65, 302137), (121, 162305), (143, 137335), (227, 86515), (605, 32461), (715, 27467), (1135, 17303), (1331, 14755), (1573, 12485), (2497, 7865), (2951, 6655)]