21586360

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4951}}^1$

素因数の和:5071

約数の個数: 32

約数和(自身を含む): 49024800

約数和(自身を除く): 27438440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4951, 9902, 19804, 24755, 39608, 49510, 99020, 198040, 539659, 1079318, 2158636, 2698295, 4317272, 5396590, 10793180, 21586360]

約数ペア:

[(1, 21586360), (2, 10793180), (4, 5396590), (5, 4317272), (8, 2698295), (10, 2158636), (20, 1079318), (40, 539659), (109, 198040), (218, 99020), (436, 49510), (545, 39608), (872, 24755), (1090, 19804), (2180, 9902), (4360, 4951)]