21126765

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{293}}^1$

素因数の和:354

約数の個数: 64

約数和(自身を含む): 40642560

約数和(自身を除く): 19515795

約数列:

[1, 3, 5, 11, 15, 19, 23, 33, 55, 57, 69, 95, 115, 165, 209, 253, 285, 293, 345, 437, 627, 759, 879, 1045, 1265, 1311, 1465, 2185, 3135, 3223, 3795, 4395, 4807, 5567, 6555, 6739, 9669, 14421, 16115, 16701, 20217, 24035, 27835, 33695, 48345, 61237, 72105, 74129, 83505, 101085, 128041, 183711, 222387, 306185, 370645, 384123, 640205, 918555, 1111935, 1408451, 1920615, 4225353, 7042255, 21126765]

約数ペア:

[(1, 21126765), (3, 7042255), (5, 4225353), (11, 1920615), (15, 1408451), (19, 1111935), (23, 918555), (33, 640205), (55, 384123), (57, 370645), (69, 306185), (95, 222387), (115, 183711), (165, 128041), (209, 101085), (253, 83505), (285, 74129), (293, 72105), (345, 61237), (437, 48345), (627, 33695), (759, 27835), (879, 24035), (1045, 20217), (1265, 16701), (1311, 16115), (1465, 14421), (2185, 9669), (3135, 6739), (3223, 6555), (3795, 5567), (4395, 4807)]