20981499

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{1489}}^1$

素因数の和:1571

約数の個数: 32

約数和(自身を含む): 35473920

約数和(自身を除く): 14492421

約数列:

[1, 3, 7, 11, 21, 33, 61, 77, 183, 231, 427, 671, 1281, 1489, 2013, 4467, 4697, 10423, 14091, 16379, 31269, 49137, 90829, 114653, 272487, 343959, 635803, 999119, 1907409, 2997357, 6993833, 20981499]

約数ペア:

[(1, 20981499), (3, 6993833), (7, 2997357), (11, 1907409), (21, 999119), (33, 635803), (61, 343959), (77, 272487), (183, 114653), (231, 90829), (427, 49137), (671, 31269), (1281, 16379), (1489, 14091), (2013, 10423), (4467, 4697)]