19788890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{179899}}^1$

素因数の和:179917

約数の個数: 16

約数和(自身を含む): 38858400

約数和(自身を除く): 19069510

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 179899, 359798, 899495, 1798990, 1978889, 3957778, 9894445, 19788890]

約数ペア:

[(1, 19788890), (2, 9894445), (5, 3957778), (10, 1978889), (11, 1798990), (22, 899495), (55, 359798), (110, 179899)]