18219520

素因数分解:

$2^9\times 5^1\times {\mathrm{11}}^1\times {\mathrm{647}}^1$

素因数の和:681

約数の個数: 80

約数和(自身を含む): 47729088

約数和(自身を除く): 29509568

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 256, 320, 352, 440, 512, 640, 647, 704, 880, 1280, 1294, 1408, 1760, 2560, 2588, 2816, 3235, 3520, 5176, 5632, 6470, 7040, 7117, 10352, 12940, 14080, 14234, 20704, 25880, 28160, 28468, 35585, 41408, 51760, 56936, 71170, 82816, 103520, 113872, 142340, 165632, 207040, 227744, 284680, 331264, 414080, 455488, 569360, 828160, 910976, 1138720, 1656320, 1821952, 2277440, 3643904, 4554880, 9109760, 18219520]

約数ペア:

[(1, 18219520), (2, 9109760), (4, 4554880), (5, 3643904), (8, 2277440), (10, 1821952), (11, 1656320), (16, 1138720), (20, 910976), (22, 828160), (32, 569360), (40, 455488), (44, 414080), (55, 331264), (64, 284680), (80, 227744), (88, 207040), (110, 165632), (128, 142340), (160, 113872), (176, 103520), (220, 82816), (256, 71170), (320, 56936), (352, 51760), (440, 41408), (512, 35585), (640, 28468), (647, 28160), (704, 25880), (880, 20704), (1280, 14234), (1294, 14080), (1408, 12940), (1760, 10352), (2560, 7117), (2588, 7040), (2816, 6470), (3235, 5632), (3520, 5176)]