20511729

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{103}}^1\times {\mathrm{109}}^1$

素因数の和:254

約数の個数: 48

約数和(自身を含む): 35692800

約数和(自身を除く): 15181071

約数列:

[1, 3, 7, 9, 21, 29, 63, 87, 103, 109, 203, 261, 309, 327, 609, 721, 763, 927, 981, 1827, 2163, 2289, 2987, 3161, 6489, 6867, 8961, 9483, 11227, 20909, 22127, 26883, 28449, 33681, 62727, 66381, 78589, 101043, 188181, 199143, 235767, 325583, 707301, 976749, 2279081, 2930247, 6837243, 20511729]

約数ペア:

[(1, 20511729), (3, 6837243), (7, 2930247), (9, 2279081), (21, 976749), (29, 707301), (63, 325583), (87, 235767), (103, 199143), (109, 188181), (203, 101043), (261, 78589), (309, 66381), (327, 62727), (609, 33681), (721, 28449), (763, 26883), (927, 22127), (981, 20909), (1827, 11227), (2163, 9483), (2289, 8961), (2987, 6867), (3161, 6489)]