81491912

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{541}}^1\times {\mathrm{991}}^1$

素因数の和:1557

約数の個数: 32

約数和(自身を含む): 161299200

約数和(自身を除く): 79807288

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 541, 991, 1082, 1982, 2164, 3964, 4328, 7928, 10279, 18829, 20558, 37658, 41116, 75316, 82232, 150632, 536131, 1072262, 2144524, 4289048, 10186489, 20372978, 40745956, 81491912]

約数ペア:

[(1, 81491912), (2, 40745956), (4, 20372978), (8, 10186489), (19, 4289048), (38, 2144524), (76, 1072262), (152, 536131), (541, 150632), (991, 82232), (1082, 75316), (1982, 41116), (2164, 37658), (3964, 20558), (4328, 18829), (7928, 10279)]