201991900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{3907}}^1$

素因数の和:3979

約数の個数: 72

約数和(自身を含む): 488468736

約数和(自身を除く): 286476836

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 47, 50, 55, 94, 100, 110, 188, 220, 235, 275, 470, 517, 550, 940, 1034, 1100, 1175, 2068, 2350, 2585, 3907, 4700, 5170, 7814, 10340, 12925, 15628, 19535, 25850, 39070, 42977, 51700, 78140, 85954, 97675, 171908, 183629, 195350, 214885, 367258, 390700, 429770, 734516, 859540, 918145, 1074425, 1836290, 2019919, 2148850, 3672580, 4039838, 4297700, 4590725, 8079676, 9181450, 10099595, 18362900, 20199190, 40398380, 50497975, 100995950, 201991900]

約数ペア:

[(1, 201991900), (2, 100995950), (4, 50497975), (5, 40398380), (10, 20199190), (11, 18362900), (20, 10099595), (22, 9181450), (25, 8079676), (44, 4590725), (47, 4297700), (50, 4039838), (55, 3672580), (94, 2148850), (100, 2019919), (110, 1836290), (188, 1074425), (220, 918145), (235, 859540), (275, 734516), (470, 429770), (517, 390700), (550, 367258), (940, 214885), (1034, 195350), (1100, 183629), (1175, 171908), (2068, 97675), (2350, 85954), (2585, 78140), (3907, 51700), (4700, 42977), (5170, 39070), (7814, 25850), (10340, 19535), (12925, 15628)]