19980355

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{313}}^1\times {\mathrm{751}}^1$

素因数の和:1086

約数の個数: 16

約数和(自身を含む): 25501824

約数和(自身を除く): 5521469

約数列:

[1, 5, 17, 85, 313, 751, 1565, 3755, 5321, 12767, 26605, 63835, 235063, 1175315, 3996071, 19980355]

約数ペア:

[(1, 19980355), (5, 3996071), (17, 1175315), (85, 235063), (313, 63835), (751, 26605), (1565, 12767), (3755, 5321)]