21503520

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{137}}^1$

素因数の和:267

約数の個数: 144

約数和(自身を含む): 74594520

約数和(自身を除く): 53091000

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 72, 80, 90, 96, 109, 120, 137, 144, 160, 180, 218, 240, 274, 288, 327, 360, 411, 436, 480, 545, 548, 654, 685, 720, 822, 872, 981, 1090, 1096, 1233, 1308, 1370, 1440, 1635, 1644, 1744, 1962, 2055, 2180, 2192, 2466, 2616, 2740, 3270, 3288, 3488, 3924, 4110, 4360, 4384, 4905, 4932, 5232, 5480, 6165, 6540, 6576, 7848, 8220, 8720, 9810, 9864, 10464, 10960, 12330, 13080, 13152, 14933, 15696, 16440, 17440, 19620, 19728, 21920, 24660, 26160, 29866, 31392, 32880, 39240, 39456, 44799, 49320, 52320, 59732, 65760, 74665, 78480, 89598, 98640, 119464, 134397, 149330, 156960, 179196, 197280, 223995, 238928, 268794, 298660, 358392, 447990, 477856, 537588, 597320, 671985, 716784, 895980, 1075176, 1194640, 1343970, 1433568, 1791960, 2150352, 2389280, 2687940, 3583920, 4300704, 5375880, 7167840, 10751760, 21503520]

約数ペア:

[(1, 21503520), (2, 10751760), (3, 7167840), (4, 5375880), (5, 4300704), (6, 3583920), (8, 2687940), (9, 2389280), (10, 2150352), (12, 1791960), (15, 1433568), (16, 1343970), (18, 1194640), (20, 1075176), (24, 895980), (30, 716784), (32, 671985), (36, 597320), (40, 537588), (45, 477856), (48, 447990), (60, 358392), (72, 298660), (80, 268794), (90, 238928), (96, 223995), (109, 197280), (120, 179196), (137, 156960), (144, 149330), (160, 134397), (180, 119464), (218, 98640), (240, 89598), (274, 78480), (288, 74665), (327, 65760), (360, 59732), (411, 52320), (436, 49320), (480, 44799), (545, 39456), (548, 39240), (654, 32880), (685, 31392), (720, 29866), (822, 26160), (872, 24660), (981, 21920), (1090, 19728), (1096, 19620), (1233, 17440), (1308, 16440), (1370, 15696), (1440, 14933), (1635, 13152), (1644, 13080), (1744, 12330), (1962, 10960), (2055, 10464), (2180, 9864), (2192, 9810), (2466, 8720), (2616, 8220), (2740, 7848), (3270, 6576), (3288, 6540), (3488, 6165), (3924, 5480), (4110, 5232), (4360, 4932), (4384, 4905)]