21507335

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{109}}^1$

素因数の和:231

約数の個数: 32

約数和(自身を含む): 28723200

約数和(自身を除く): 7215865

約数列:

[1, 5, 19, 31, 67, 95, 109, 155, 335, 545, 589, 1273, 2071, 2077, 2945, 3379, 6365, 7303, 10355, 10385, 16895, 36515, 39463, 64201, 138757, 197315, 226393, 321005, 693785, 1131965, 4301467, 21507335]

約数ペア:

[(1, 21507335), (5, 4301467), (19, 1131965), (31, 693785), (67, 321005), (95, 226393), (109, 197315), (155, 138757), (335, 64201), (545, 39463), (589, 36515), (1273, 16895), (2071, 10385), (2077, 10355), (2945, 7303), (3379, 6365)]