21055440

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{151}}^1$

素因数の和:257

約数の個数: 160

約数和(自身を含む): 75995136

約数和(自身を除く): 54939696

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 83, 84, 105, 112, 120, 140, 151, 166, 168, 210, 240, 249, 280, 302, 332, 336, 415, 420, 453, 498, 560, 581, 604, 664, 755, 830, 840, 906, 996, 1057, 1162, 1208, 1245, 1328, 1510, 1660, 1680, 1743, 1812, 1992, 2114, 2265, 2324, 2416, 2490, 2905, 3020, 3171, 3320, 3486, 3624, 3984, 4228, 4530, 4648, 4980, 5285, 5810, 6040, 6342, 6640, 6972, 7248, 8456, 8715, 9060, 9296, 9960, 10570, 11620, 12080, 12533, 12684, 13944, 15855, 16912, 17430, 18120, 19920, 21140, 23240, 25066, 25368, 27888, 31710, 34860, 36240, 37599, 42280, 46480, 50132, 50736, 62665, 63420, 69720, 75198, 84560, 87731, 100264, 125330, 126840, 139440, 150396, 175462, 187995, 200528, 250660, 253680, 263193, 300792, 350924, 375990, 438655, 501320, 526386, 601584, 701848, 751980, 877310, 1002640, 1052772, 1315965, 1403696, 1503960, 1754620, 2105544, 2631930, 3007920, 3509240, 4211088, 5263860, 7018480, 10527720, 21055440]

約数ペア:

[(1, 21055440), (2, 10527720), (3, 7018480), (4, 5263860), (5, 4211088), (6, 3509240), (7, 3007920), (8, 2631930), (10, 2105544), (12, 1754620), (14, 1503960), (15, 1403696), (16, 1315965), (20, 1052772), (21, 1002640), (24, 877310), (28, 751980), (30, 701848), (35, 601584), (40, 526386), (42, 501320), (48, 438655), (56, 375990), (60, 350924), (70, 300792), (80, 263193), (83, 253680), (84, 250660), (105, 200528), (112, 187995), (120, 175462), (140, 150396), (151, 139440), (166, 126840), (168, 125330), (210, 100264), (240, 87731), (249, 84560), (280, 75198), (302, 69720), (332, 63420), (336, 62665), (415, 50736), (420, 50132), (453, 46480), (498, 42280), (560, 37599), (581, 36240), (604, 34860), (664, 31710), (755, 27888), (830, 25368), (840, 25066), (906, 23240), (996, 21140), (1057, 19920), (1162, 18120), (1208, 17430), (1245, 16912), (1328, 15855), (1510, 13944), (1660, 12684), (1680, 12533), (1743, 12080), (1812, 11620), (1992, 10570), (2114, 9960), (2265, 9296), (2324, 9060), (2416, 8715), (2490, 8456), (2905, 7248), (3020, 6972), (3171, 6640), (3320, 6342), (3486, 6040), (3624, 5810), (3984, 5285), (4228, 4980), (4530, 4648)]