81479680

素因数分解:

$2^{11}\times 5^1\times {\mathrm{73}}^1\times {\mathrm{109}}^1$

素因数の和:209

約数の個数: 96

約数和(自身を含む): 199999800

約数和(自身を除く): 118520120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 73, 80, 109, 128, 146, 160, 218, 256, 292, 320, 365, 436, 512, 545, 584, 640, 730, 872, 1024, 1090, 1168, 1280, 1460, 1744, 2048, 2180, 2336, 2560, 2920, 3488, 4360, 4672, 5120, 5840, 6976, 7957, 8720, 9344, 10240, 11680, 13952, 15914, 17440, 18688, 23360, 27904, 31828, 34880, 37376, 39785, 46720, 55808, 63656, 69760, 74752, 79570, 93440, 111616, 127312, 139520, 149504, 159140, 186880, 223232, 254624, 279040, 318280, 373760, 509248, 558080, 636560, 747520, 1018496, 1116160, 1273120, 2036992, 2546240, 4073984, 5092480, 8147968, 10184960, 16295936, 20369920, 40739840, 81479680]

約数ペア:

[(1, 81479680), (2, 40739840), (4, 20369920), (5, 16295936), (8, 10184960), (10, 8147968), (16, 5092480), (20, 4073984), (32, 2546240), (40, 2036992), (64, 1273120), (73, 1116160), (80, 1018496), (109, 747520), (128, 636560), (146, 558080), (160, 509248), (218, 373760), (256, 318280), (292, 279040), (320, 254624), (365, 223232), (436, 186880), (512, 159140), (545, 149504), (584, 139520), (640, 127312), (730, 111616), (872, 93440), (1024, 79570), (1090, 74752), (1168, 69760), (1280, 63656), (1460, 55808), (1744, 46720), (2048, 39785), (2180, 37376), (2336, 34880), (2560, 31828), (2920, 27904), (3488, 23360), (4360, 18688), (4672, 17440), (5120, 15914), (5840, 13952), (6976, 11680), (7957, 10240), (8720, 9344)]