21881457

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{6449}}^1$

素因数の和:6497

約数の個数: 24

約数和(自身を含む): 35217000

約数和(自身を除く): 13335543

約数列:

[1, 3, 9, 13, 29, 39, 87, 117, 261, 377, 1131, 3393, 6449, 19347, 58041, 83837, 187021, 251511, 561063, 754533, 1683189, 2431273, 7293819, 21881457]

約数ペア:

[(1, 21881457), (3, 7293819), (9, 2431273), (13, 1683189), (29, 754533), (39, 561063), (87, 251511), (117, 187021), (261, 83837), (377, 58041), (1131, 19347), (3393, 6449)]