21677805

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{659}}^1$

素因数の和:730

約数の個数: 48

約数和(自身を含む): 40772160

約数和(自身を除く): 19094355

約数列:

[1, 3, 5, 9, 15, 17, 43, 45, 51, 85, 129, 153, 215, 255, 387, 645, 659, 731, 765, 1935, 1977, 2193, 3295, 3655, 5931, 6579, 9885, 10965, 11203, 28337, 29655, 32895, 33609, 56015, 85011, 100827, 141685, 168045, 255033, 425055, 481729, 504135, 1275165, 1445187, 2408645, 4335561, 7225935, 21677805]

約数ペア:

[(1, 21677805), (3, 7225935), (5, 4335561), (9, 2408645), (15, 1445187), (17, 1275165), (43, 504135), (45, 481729), (51, 425055), (85, 255033), (129, 168045), (153, 141685), (215, 100827), (255, 85011), (387, 56015), (645, 33609), (659, 32895), (731, 29655), (765, 28337), (1935, 11203), (1977, 10965), (2193, 9885), (3295, 6579), (3655, 5931)]