21563055

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{397}}^1$

素因数の和:496

約数の個数: 48

約数和(自身を含む): 40233024

約数和(自身を除く): 18669969

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 71, 85, 153, 213, 255, 355, 397, 639, 765, 1065, 1191, 1207, 1985, 3195, 3573, 3621, 5955, 6035, 6749, 10863, 17865, 18105, 20247, 28187, 33745, 54315, 60741, 84561, 101235, 140935, 253683, 303705, 422805, 479179, 1268415, 1437537, 2395895, 4312611, 7187685, 21563055]

約数ペア:

[(1, 21563055), (3, 7187685), (5, 4312611), (9, 2395895), (15, 1437537), (17, 1268415), (45, 479179), (51, 422805), (71, 303705), (85, 253683), (153, 140935), (213, 101235), (255, 84561), (355, 60741), (397, 54315), (639, 33745), (765, 28187), (1065, 20247), (1191, 18105), (1207, 17865), (1985, 10863), (3195, 6749), (3573, 6035), (3621, 5955)]