19787440

素因数分解:

$2^4\times 5^1\times {\mathrm{247343}}^1$

素因数の和:247356

約数の個数: 20

約数和(自身を含む): 46005984

約数和(自身を除く): 26218544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247343, 494686, 989372, 1236715, 1978744, 2473430, 3957488, 4946860, 9893720, 19787440]

約数ペア:

[(1, 19787440), (2, 9893720), (4, 4946860), (5, 3957488), (8, 2473430), (10, 1978744), (16, 1236715), (20, 989372), (40, 494686), (80, 247343)]