261620920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{647}}^1\times {\mathrm{919}}^1$

素因数の和:1588

約数の個数: 64

約数和(自身を含む): 643852800

約数和(自身を除く): 382231880

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 647, 919, 1294, 1838, 2588, 3235, 3676, 4595, 5176, 6470, 7117, 7352, 9190, 10109, 12940, 14234, 18380, 20218, 25880, 28468, 35585, 36760, 40436, 50545, 56936, 71170, 80872, 101090, 142340, 202180, 284680, 404360, 594593, 1189186, 2378372, 2972965, 4756744, 5945930, 6540523, 11891860, 13081046, 23783720, 26162092, 32702615, 52324184, 65405230, 130810460, 261620920]

約数ペア:

[(1, 261620920), (2, 130810460), (4, 65405230), (5, 52324184), (8, 32702615), (10, 26162092), (11, 23783720), (20, 13081046), (22, 11891860), (40, 6540523), (44, 5945930), (55, 4756744), (88, 2972965), (110, 2378372), (220, 1189186), (440, 594593), (647, 404360), (919, 284680), (1294, 202180), (1838, 142340), (2588, 101090), (3235, 80872), (3676, 71170), (4595, 56936), (5176, 50545), (6470, 40436), (7117, 36760), (7352, 35585), (9190, 28468), (10109, 25880), (12940, 20218), (14234, 18380)]