18939295

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{109}}^1$

素因数の和:223

約数の個数: 32

約数和(自身を含む): 25344000

約数和(自身を除く): 6404705

約数列:

[1, 5, 19, 31, 59, 95, 109, 155, 295, 545, 589, 1121, 1829, 2071, 2945, 3379, 5605, 6431, 9145, 10355, 16895, 32155, 34751, 64201, 122189, 173755, 199361, 321005, 610945, 996805, 3787859, 18939295]

約数ペア:

[(1, 18939295), (5, 3787859), (19, 996805), (31, 610945), (59, 321005), (95, 199361), (109, 173755), (155, 122189), (295, 64201), (545, 34751), (589, 32155), (1121, 16895), (1829, 10355), (2071, 9145), (2945, 6431), (3379, 5605)]