19978904

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{9871}}^1$

素因数の和:9911

約数の個数: 32

約数和(自身を含む): 42647040

約数和(自身を除く): 22668136

約数列:

[1, 2, 4, 8, 11, 22, 23, 44, 46, 88, 92, 184, 253, 506, 1012, 2024, 9871, 19742, 39484, 78968, 108581, 217162, 227033, 434324, 454066, 868648, 908132, 1816264, 2497363, 4994726, 9989452, 19978904]

約数ペア:

[(1, 19978904), (2, 9989452), (4, 4994726), (8, 2497363), (11, 1816264), (22, 908132), (23, 868648), (44, 454066), (46, 434324), (88, 227033), (92, 217162), (184, 108581), (253, 78968), (506, 39484), (1012, 19742), (2024, 9871)]