181520920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{648289}}^1$

素因数の和:648307

約数の個数: 32

約数和(自身を含む): 466768800

約数和(自身を除く): 285247880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 648289, 1296578, 2593156, 3241445, 4538023, 5186312, 6482890, 9076046, 12965780, 18152092, 22690115, 25931560, 36304184, 45380230, 90760460, 181520920]

約数ペア:

[(1, 181520920), (2, 90760460), (4, 45380230), (5, 36304184), (7, 25931560), (8, 22690115), (10, 18152092), (14, 12965780), (20, 9076046), (28, 6482890), (35, 5186312), (40, 4538023), (56, 3241445), (70, 2593156), (140, 1296578), (280, 648289)]