20543880

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{661}}^1$

素因数の和:719

約数の個数: 128

約数和(自身を含む): 72449280

約数和(自身を除く): 51905400

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 37, 40, 42, 56, 60, 70, 74, 84, 105, 111, 120, 140, 148, 168, 185, 210, 222, 259, 280, 296, 370, 420, 444, 518, 555, 661, 740, 777, 840, 888, 1036, 1110, 1295, 1322, 1480, 1554, 1983, 2072, 2220, 2590, 2644, 3108, 3305, 3885, 3966, 4440, 4627, 5180, 5288, 6216, 6610, 7770, 7932, 9254, 9915, 10360, 13220, 13881, 15540, 15864, 18508, 19830, 23135, 24457, 26440, 27762, 31080, 37016, 39660, 46270, 48914, 55524, 69405, 73371, 79320, 92540, 97828, 111048, 122285, 138810, 146742, 171199, 185080, 195656, 244570, 277620, 293484, 342398, 366855, 489140, 513597, 555240, 586968, 684796, 733710, 855995, 978280, 1027194, 1369592, 1467420, 1711990, 2054388, 2567985, 2934840, 3423980, 4108776, 5135970, 6847960, 10271940, 20543880]

約数ペア:

[(1, 20543880), (2, 10271940), (3, 6847960), (4, 5135970), (5, 4108776), (6, 3423980), (7, 2934840), (8, 2567985), (10, 2054388), (12, 1711990), (14, 1467420), (15, 1369592), (20, 1027194), (21, 978280), (24, 855995), (28, 733710), (30, 684796), (35, 586968), (37, 555240), (40, 513597), (42, 489140), (56, 366855), (60, 342398), (70, 293484), (74, 277620), (84, 244570), (105, 195656), (111, 185080), (120, 171199), (140, 146742), (148, 138810), (168, 122285), (185, 111048), (210, 97828), (222, 92540), (259, 79320), (280, 73371), (296, 69405), (370, 55524), (420, 48914), (444, 46270), (518, 39660), (555, 37016), (661, 31080), (740, 27762), (777, 26440), (840, 24457), (888, 23135), (1036, 19830), (1110, 18508), (1295, 15864), (1322, 15540), (1480, 13881), (1554, 13220), (1983, 10360), (2072, 9915), (2220, 9254), (2590, 7932), (2644, 7770), (3108, 6610), (3305, 6216), (3885, 5288), (3966, 5180), (4440, 4627)]