19917776

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{65519}}^1$

素因数の和:65546

約数の個数: 20

約数和(自身を含む): 40622400

約数和(自身を除く): 20704624

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 65519, 131038, 262076, 524152, 1048304, 1244861, 2489722, 4979444, 9958888, 19917776]

約数ペア:

[(1, 19917776), (2, 9958888), (4, 4979444), (8, 2489722), (16, 1244861), (19, 1048304), (38, 524152), (76, 262076), (152, 131038), (304, 65519)]