21138999

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{103}}^1\times {\mathrm{337}}^1$

素因数の和:479

約数の個数: 32

約数和(自身を含む): 33745920

約数和(自身を除く): 12606921

約数列:

[1, 3, 7, 21, 29, 87, 103, 203, 309, 337, 609, 721, 1011, 2163, 2359, 2987, 7077, 8961, 9773, 20909, 29319, 34711, 62727, 68411, 104133, 205233, 242977, 728931, 1006619, 3019857, 7046333, 21138999]

約数ペア:

[(1, 21138999), (3, 7046333), (7, 3019857), (21, 1006619), (29, 728931), (87, 242977), (103, 205233), (203, 104133), (309, 68411), (337, 62727), (609, 34711), (721, 29319), (1011, 20909), (2163, 9773), (2359, 8961), (2987, 7077)]