19922540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{661}}^1$

素因数の和:818

約数の個数: 48

約数和(自身を含む): 46043424

約数和(自身を除く): 26120884

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 137, 220, 274, 548, 661, 685, 1322, 1370, 1507, 2644, 2740, 3014, 3305, 6028, 6610, 7271, 7535, 13220, 14542, 15070, 29084, 30140, 36355, 72710, 90557, 145420, 181114, 362228, 452785, 905570, 996127, 1811140, 1992254, 3984508, 4980635, 9961270, 19922540]

約数ペア:

[(1, 19922540), (2, 9961270), (4, 4980635), (5, 3984508), (10, 1992254), (11, 1811140), (20, 996127), (22, 905570), (44, 452785), (55, 362228), (110, 181114), (137, 145420), (220, 90557), (274, 72710), (548, 36355), (661, 30140), (685, 29084), (1322, 15070), (1370, 14542), (1507, 13220), (2644, 7535), (2740, 7271), (3014, 6610), (3305, 6028)]