18861505

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:217

約数の個数: 32

約数和(自身を含む): 25498368

約数和(自身を除く): 6636863

約数列:

[1, 5, 13, 61, 65, 67, 71, 305, 335, 355, 793, 871, 923, 3965, 4087, 4331, 4355, 4615, 4757, 20435, 21655, 23785, 53131, 56303, 61841, 265655, 281515, 290177, 309205, 1450885, 3772301, 18861505]

約数ペア:

[(1, 18861505), (5, 3772301), (13, 1450885), (61, 309205), (65, 290177), (67, 281515), (71, 265655), (305, 61841), (335, 56303), (355, 53131), (793, 23785), (871, 21655), (923, 20435), (3965, 4757), (4087, 4615), (4331, 4355)]