18720520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:207

約数の個数: 128

約数和(自身を含む): 53625600

約数和(自身を除く): 34905080

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 37, 40, 52, 56, 65, 70, 74, 91, 104, 130, 139, 140, 148, 182, 185, 259, 260, 278, 280, 296, 364, 370, 455, 481, 518, 520, 556, 695, 728, 740, 910, 962, 973, 1036, 1112, 1295, 1390, 1480, 1807, 1820, 1924, 1946, 2072, 2405, 2590, 2780, 3367, 3614, 3640, 3848, 3892, 4810, 4865, 5143, 5180, 5560, 6734, 7228, 7784, 9035, 9620, 9730, 10286, 10360, 12649, 13468, 14456, 16835, 18070, 19240, 19460, 20572, 25298, 25715, 26936, 33670, 36001, 36140, 38920, 41144, 50596, 51430, 63245, 66859, 67340, 72002, 72280, 101192, 102860, 126490, 133718, 134680, 144004, 180005, 205720, 252980, 267436, 288008, 334295, 360010, 468013, 505960, 534872, 668590, 720020, 936026, 1337180, 1440040, 1872052, 2340065, 2674360, 3744104, 4680130, 9360260, 18720520]

約数ペア:

[(1, 18720520), (2, 9360260), (4, 4680130), (5, 3744104), (7, 2674360), (8, 2340065), (10, 1872052), (13, 1440040), (14, 1337180), (20, 936026), (26, 720020), (28, 668590), (35, 534872), (37, 505960), (40, 468013), (52, 360010), (56, 334295), (65, 288008), (70, 267436), (74, 252980), (91, 205720), (104, 180005), (130, 144004), (139, 134680), (140, 133718), (148, 126490), (182, 102860), (185, 101192), (259, 72280), (260, 72002), (278, 67340), (280, 66859), (296, 63245), (364, 51430), (370, 50596), (455, 41144), (481, 38920), (518, 36140), (520, 36001), (556, 33670), (695, 26936), (728, 25715), (740, 25298), (910, 20572), (962, 19460), (973, 19240), (1036, 18070), (1112, 16835), (1295, 14456), (1390, 13468), (1480, 12649), (1807, 10360), (1820, 10286), (1924, 9730), (1946, 9620), (2072, 9035), (2405, 7784), (2590, 7228), (2780, 6734), (3367, 5560), (3614, 5180), (3640, 5143), (3848, 4865), (3892, 4810)]