21870640

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{857}}^1$

素因数の和:910

約数の個数: 80

約数和(自身を含む): 57451680

約数和(自身を除く): 35581040

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 29, 40, 44, 55, 58, 80, 88, 110, 116, 145, 176, 220, 232, 290, 319, 440, 464, 580, 638, 857, 880, 1160, 1276, 1595, 1714, 2320, 2552, 3190, 3428, 4285, 5104, 6380, 6856, 8570, 9427, 12760, 13712, 17140, 18854, 24853, 25520, 34280, 37708, 47135, 49706, 68560, 75416, 94270, 99412, 124265, 150832, 188540, 198824, 248530, 273383, 377080, 397648, 497060, 546766, 754160, 994120, 1093532, 1366915, 1988240, 2187064, 2733830, 4374128, 5467660, 10935320, 21870640]

約数ペア:

[(1, 21870640), (2, 10935320), (4, 5467660), (5, 4374128), (8, 2733830), (10, 2187064), (11, 1988240), (16, 1366915), (20, 1093532), (22, 994120), (29, 754160), (40, 546766), (44, 497060), (55, 397648), (58, 377080), (80, 273383), (88, 248530), (110, 198824), (116, 188540), (145, 150832), (176, 124265), (220, 99412), (232, 94270), (290, 75416), (319, 68560), (440, 49706), (464, 47135), (580, 37708), (638, 34280), (857, 25520), (880, 24853), (1160, 18854), (1276, 17140), (1595, 13712), (1714, 12760), (2320, 9427), (2552, 8570), (3190, 6856), (3428, 6380), (4285, 5104)]