18121520

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{107}}^1$

素因数の和:222

約数の個数: 80

約数和(自身を含む): 44595360

約数和(自身を除く): 26473840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 73, 80, 107, 116, 145, 146, 214, 232, 290, 292, 365, 428, 464, 535, 580, 584, 730, 856, 1070, 1160, 1168, 1460, 1712, 2117, 2140, 2320, 2920, 3103, 4234, 4280, 5840, 6206, 7811, 8468, 8560, 10585, 12412, 15515, 15622, 16936, 21170, 24824, 31030, 31244, 33872, 39055, 42340, 49648, 62060, 62488, 78110, 84680, 124120, 124976, 156220, 169360, 226519, 248240, 312440, 453038, 624880, 906076, 1132595, 1812152, 2265190, 3624304, 4530380, 9060760, 18121520]

約数ペア:

[(1, 18121520), (2, 9060760), (4, 4530380), (5, 3624304), (8, 2265190), (10, 1812152), (16, 1132595), (20, 906076), (29, 624880), (40, 453038), (58, 312440), (73, 248240), (80, 226519), (107, 169360), (116, 156220), (145, 124976), (146, 124120), (214, 84680), (232, 78110), (290, 62488), (292, 62060), (365, 49648), (428, 42340), (464, 39055), (535, 33872), (580, 31244), (584, 31030), (730, 24824), (856, 21170), (1070, 16936), (1160, 15622), (1168, 15515), (1460, 12412), (1712, 10585), (2117, 8560), (2140, 8468), (2320, 7811), (2920, 6206), (3103, 5840), (4234, 4280)]