21580805

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1$

素因数の和:197

約数の個数: 32

約数和(自身を含む): 28366848

約数和(自身を除く): 6786043

約数列:

[1, 5, 31, 37, 53, 71, 155, 185, 265, 355, 1147, 1643, 1961, 2201, 2627, 3763, 5735, 8215, 9805, 11005, 13135, 18815, 60791, 81437, 116653, 139231, 303955, 407185, 583265, 696155, 4316161, 21580805]

約数ペア:

[(1, 21580805), (5, 4316161), (31, 696155), (37, 583265), (53, 407185), (71, 303955), (155, 139231), (185, 116653), (265, 81437), (355, 60791), (1147, 18815), (1643, 13135), (1961, 11005), (2201, 9805), (2627, 8215), (3763, 5735)]