21090328

素因数分解:

$2^3\times 7^1\times {\mathrm{137}}^1\times {\mathrm{2749}}^1$

素因数の和:2899

約数の個数: 32

約数和(自身を含む): 45540000

約数和(自身を除く): 24449672

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 137, 274, 548, 959, 1096, 1918, 2749, 3836, 5498, 7672, 10996, 19243, 21992, 38486, 76972, 153944, 376613, 753226, 1506452, 2636291, 3012904, 5272582, 10545164, 21090328]

約数ペア:

[(1, 21090328), (2, 10545164), (4, 5272582), (7, 3012904), (8, 2636291), (14, 1506452), (28, 753226), (56, 376613), (137, 153944), (274, 76972), (548, 38486), (959, 21992), (1096, 19243), (1918, 10996), (2749, 7672), (3836, 5498)]