21259645

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{337}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 29592576

約数和(自身を除く): 8332931

約数列:

[1, 5, 11, 31, 37, 55, 155, 185, 337, 341, 407, 1147, 1685, 1705, 2035, 3707, 5735, 10447, 12469, 12617, 18535, 52235, 62345, 63085, 114917, 137159, 386539, 574585, 685795, 1932695, 4251929, 21259645]

約数ペア:

[(1, 21259645), (5, 4251929), (11, 1932695), (31, 685795), (37, 574585), (55, 386539), (155, 137159), (185, 114917), (337, 63085), (341, 62345), (407, 52235), (1147, 18535), (1685, 12617), (1705, 12469), (2035, 10447), (3707, 5735)]