19841840

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1259}}^1$

素因数の和:1469

約数の個数: 40

約数和(自身を含む): 46403280

約数和(自身を除く): 26561440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1259, 1576, 1970, 2518, 3152, 3940, 5036, 6295, 7880, 10072, 12590, 15760, 20144, 25180, 50360, 100720, 248023, 496046, 992092, 1240115, 1984184, 2480230, 3968368, 4960460, 9920920, 19841840]

約数ペア:

[(1, 19841840), (2, 9920920), (4, 4960460), (5, 3968368), (8, 2480230), (10, 1984184), (16, 1240115), (20, 992092), (40, 496046), (80, 248023), (197, 100720), (394, 50360), (788, 25180), (985, 20144), (1259, 15760), (1576, 12590), (1970, 10072), (2518, 7880), (3152, 6295), (3940, 5036)]