21080920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{75289}}^1$

素因数の和:75307

約数の個数: 32

約数和(自身を含む): 54208800

約数和(自身を除く): 33127880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 75289, 150578, 301156, 376445, 527023, 602312, 752890, 1054046, 1505780, 2108092, 2635115, 3011560, 4216184, 5270230, 10540460, 21080920]

約数ペア:

[(1, 21080920), (2, 10540460), (4, 5270230), (5, 4216184), (7, 3011560), (8, 2635115), (10, 2108092), (14, 1505780), (20, 1054046), (28, 752890), (35, 602312), (40, 527023), (56, 376445), (70, 301156), (140, 150578), (280, 75289)]