20409979919

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{21767}}^1$

素因数の和:21983

約数の個数: 32

約数和(自身を含む): 25076736000

約数和(自身を除く): 4666756081

約数列:

[1, 7, 29, 31, 149, 203, 217, 899, 1043, 4321, 4619, 6293, 21767, 30247, 32333, 133951, 152369, 631243, 674777, 937657, 3243283, 4418701, 4723439, 19568533, 22702981, 94055207, 100541773, 136979731, 658386449, 703792411, 2915711417, 20409979919]

約数ペア:

[(1, 20409979919), (7, 2915711417), (29, 703792411), (31, 658386449), (149, 136979731), (203, 100541773), (217, 94055207), (899, 22702981), (1043, 19568533), (4321, 4723439), (4619, 4418701), (6293, 3243283), (21767, 937657), (30247, 674777), (32333, 631243), (133951, 152369)]