21816561

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1\times {\mathrm{97}}^1$

素因数の和:265

約数の個数: 32

約数和(自身を含む): 32488960

約数和(自身を除く): 10672399

約数列:

[1, 3, 13, 39, 73, 79, 97, 219, 237, 291, 949, 1027, 1261, 2847, 3081, 3783, 5767, 7081, 7663, 17301, 21243, 22989, 74971, 92053, 99619, 224913, 276159, 298857, 559399, 1678197, 7272187, 21816561]

約数ペア:

[(1, 21816561), (3, 7272187), (13, 1678197), (39, 559399), (73, 298857), (79, 276159), (97, 224913), (219, 99619), (237, 92053), (291, 74971), (949, 22989), (1027, 21243), (1261, 17301), (2847, 7663), (3081, 7081), (3783, 5767)]