20296731

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1$

素因数の和:105

約数の個数: 72

約数和(自身を含む): 36717120

約数和(自身を除く): 16420389

約数列:

[1, 3, 7, 13, 19, 21, 39, 43, 49, 57, 91, 129, 133, 147, 169, 247, 273, 301, 399, 507, 559, 637, 741, 817, 903, 931, 1183, 1677, 1729, 1911, 2107, 2451, 2793, 3211, 3549, 3913, 5187, 5719, 6321, 7267, 8281, 9633, 10621, 11739, 12103, 17157, 21801, 22477, 24843, 27391, 31863, 36309, 40033, 50869, 67431, 74347, 82173, 120099, 138073, 152607, 157339, 223041, 356083, 414219, 472017, 520429, 966511, 1068249, 1561287, 2899533, 6765577, 20296731]

約数ペア:

[(1, 20296731), (3, 6765577), (7, 2899533), (13, 1561287), (19, 1068249), (21, 966511), (39, 520429), (43, 472017), (49, 414219), (57, 356083), (91, 223041), (129, 157339), (133, 152607), (147, 138073), (169, 120099), (247, 82173), (273, 74347), (301, 67431), (399, 50869), (507, 40033), (559, 36309), (637, 31863), (741, 27391), (817, 24843), (903, 22477), (931, 21801), (1183, 17157), (1677, 12103), (1729, 11739), (1911, 10621), (2107, 9633), (2451, 8281), (2793, 7267), (3211, 6321), (3549, 5719), (3913, 5187)]