21070720

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1$

素因数の和:144

約数の個数: 128

約数和(自身を含む): 57062880

約数和(自身を除く): 35992160

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 41, 44, 55, 64, 73, 80, 82, 88, 110, 128, 146, 160, 164, 176, 205, 220, 292, 320, 328, 352, 365, 410, 440, 451, 584, 640, 656, 704, 730, 803, 820, 880, 902, 1168, 1312, 1408, 1460, 1606, 1640, 1760, 1804, 2255, 2336, 2624, 2920, 2993, 3212, 3280, 3520, 3608, 4015, 4510, 4672, 5248, 5840, 5986, 6424, 6560, 7040, 7216, 8030, 9020, 9344, 11680, 11972, 12848, 13120, 14432, 14965, 16060, 18040, 23360, 23944, 25696, 26240, 28864, 29930, 32120, 32923, 36080, 46720, 47888, 51392, 57728, 59860, 64240, 65846, 72160, 95776, 102784, 119720, 128480, 131692, 144320, 164615, 191552, 239440, 256960, 263384, 288640, 329230, 383104, 478880, 513920, 526768, 658460, 957760, 1053536, 1316920, 1915520, 2107072, 2633840, 4214144, 5267680, 10535360, 21070720]

約数ペア:

[(1, 21070720), (2, 10535360), (4, 5267680), (5, 4214144), (8, 2633840), (10, 2107072), (11, 1915520), (16, 1316920), (20, 1053536), (22, 957760), (32, 658460), (40, 526768), (41, 513920), (44, 478880), (55, 383104), (64, 329230), (73, 288640), (80, 263384), (82, 256960), (88, 239440), (110, 191552), (128, 164615), (146, 144320), (160, 131692), (164, 128480), (176, 119720), (205, 102784), (220, 95776), (292, 72160), (320, 65846), (328, 64240), (352, 59860), (365, 57728), (410, 51392), (440, 47888), (451, 46720), (584, 36080), (640, 32923), (656, 32120), (704, 29930), (730, 28864), (803, 26240), (820, 25696), (880, 23944), (902, 23360), (1168, 18040), (1312, 16060), (1408, 14965), (1460, 14432), (1606, 13120), (1640, 12848), (1760, 11972), (1804, 11680), (2255, 9344), (2336, 9020), (2624, 8030), (2920, 7216), (2993, 7040), (3212, 6560), (3280, 6424), (3520, 5986), (3608, 5840), (4015, 5248), (4510, 4672)]