21408009

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{127}}^1\times {\mathrm{349}}^1$

素因数の和:509

約数の個数: 32

約数和(自身を含む): 34406400

約数和(自身を除く): 12998391

約数列:

[1, 3, 7, 21, 23, 69, 127, 161, 349, 381, 483, 889, 1047, 2443, 2667, 2921, 7329, 8027, 8763, 20447, 24081, 44323, 56189, 61341, 132969, 168567, 310261, 930783, 1019429, 3058287, 7136003, 21408009]

約数ペア:

[(1, 21408009), (3, 7136003), (7, 3058287), (21, 1019429), (23, 930783), (69, 310261), (127, 168567), (161, 132969), (349, 61341), (381, 56189), (483, 44323), (889, 24081), (1047, 20447), (2443, 8763), (2667, 8027), (2921, 7329)]