21378880

素因数分解:

$2^6\times 5^1\times {\mathrm{66809}}^1$

素因数の和:66826

約数の個数: 28

約数和(自身を含む): 50909220

約数和(自身を除く): 29530340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 66809, 133618, 267236, 334045, 534472, 668090, 1068944, 1336180, 2137888, 2672360, 4275776, 5344720, 10689440, 21378880]

約数ペア:

[(1, 21378880), (2, 10689440), (4, 5344720), (5, 4275776), (8, 2672360), (10, 2137888), (16, 1336180), (20, 1068944), (32, 668090), (40, 534472), (64, 334045), (80, 267236), (160, 133618), (320, 66809)]