21688280

素因数分解:

$2^3\times 5^1\times {\mathrm{542207}}^1$

素因数の和:542218

約数の個数: 16

約数和(自身を含む): 48798720

約数和(自身を除く): 27110440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 542207, 1084414, 2168828, 2711035, 4337656, 5422070, 10844140, 21688280]

約数ペア:

[(1, 21688280), (2, 10844140), (4, 5422070), (5, 4337656), (8, 2711035), (10, 2168828), (20, 1084414), (40, 542207)]