9920920

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1259}}^1$

素因数の和:1467

約数の個数: 32

約数和(自身を含む): 22453200

約数和(自身を除く): 12532280

約数列:

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

約数ペア:

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