21581365

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{107}}^2$

素因数の和:261

約数の個数: 24

約数和(自身を含む): 29123640

約数和(自身を除く): 7542275

約数列:

[1, 5, 13, 29, 65, 107, 145, 377, 535, 1391, 1885, 3103, 6955, 11449, 15515, 40339, 57245, 148837, 201695, 332021, 744185, 1660105, 4316273, 21581365]

約数ペア:

[(1, 21581365), (5, 4316273), (13, 1660105), (29, 744185), (65, 332021), (107, 201695), (145, 148837), (377, 57245), (535, 40339), (1391, 15515), (1885, 11449), (3103, 6955)]