21708080

素因数分解:

$2^4\times 5^1\times {\mathrm{271351}}^1$

素因数の和:271364

約数の個数: 20

約数和(自身を含む): 50471472

約数和(自身を除く): 28763392

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271351, 542702, 1085404, 1356755, 2170808, 2713510, 4341616, 5427020, 10854040, 21708080]

約数ペア:

[(1, 21708080), (2, 10854040), (4, 5427020), (5, 4341616), (8, 2713510), (10, 2170808), (16, 1356755), (20, 1085404), (40, 542702), (80, 271351)]