19981205

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{7583}}^1$

素因数の和:7636

約数の個数: 16

約数和(自身を含む): 26210304

約数和(自身を除く): 6229099

約数列:

[1, 5, 17, 31, 85, 155, 527, 2635, 7583, 37915, 128911, 235073, 644555, 1175365, 3996241, 19981205]

約数ペア:

[(1, 19981205), (5, 3996241), (17, 1175365), (31, 644555), (85, 235073), (155, 128911), (527, 37915), (2635, 7583)]