21109920

素因数分解:

$2^5\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{199}}^1$

素因数の和:247

約数の個数: 192

約数和(自身を含む): 76204800

約数和(自身を除く): 55094880

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 17, 20, 24, 26, 30, 32, 34, 39, 40, 48, 51, 52, 60, 65, 68, 78, 80, 85, 96, 102, 104, 120, 130, 136, 156, 160, 170, 195, 199, 204, 208, 221, 240, 255, 260, 272, 312, 340, 390, 398, 408, 416, 442, 480, 510, 520, 544, 597, 624, 663, 680, 780, 796, 816, 884, 995, 1020, 1040, 1105, 1194, 1248, 1326, 1360, 1560, 1592, 1632, 1768, 1990, 2040, 2080, 2210, 2388, 2587, 2652, 2720, 2985, 3120, 3184, 3315, 3383, 3536, 3980, 4080, 4420, 4776, 5174, 5304, 5970, 6240, 6368, 6630, 6766, 7072, 7761, 7960, 8160, 8840, 9552, 10149, 10348, 10608, 11940, 12935, 13260, 13532, 15522, 15920, 16915, 17680, 19104, 20298, 20696, 21216, 23880, 25870, 26520, 27064, 31044, 31840, 33830, 35360, 38805, 40596, 41392, 43979, 47760, 50745, 51740, 53040, 54128, 62088, 67660, 77610, 81192, 82784, 87958, 95520, 101490, 103480, 106080, 108256, 124176, 131937, 135320, 155220, 162384, 175916, 202980, 206960, 219895, 248352, 263874, 270640, 310440, 324768, 351832, 405960, 413920, 439790, 527748, 541280, 620880, 659685, 703664, 811920, 879580, 1055496, 1241760, 1319370, 1407328, 1623840, 1759160, 2110992, 2638740, 3518320, 4221984, 5277480, 7036640, 10554960, 21109920]

約数ペア:

[(1, 21109920), (2, 10554960), (3, 7036640), (4, 5277480), (5, 4221984), (6, 3518320), (8, 2638740), (10, 2110992), (12, 1759160), (13, 1623840), (15, 1407328), (16, 1319370), (17, 1241760), (20, 1055496), (24, 879580), (26, 811920), (30, 703664), (32, 659685), (34, 620880), (39, 541280), (40, 527748), (48, 439790), (51, 413920), (52, 405960), (60, 351832), (65, 324768), (68, 310440), (78, 270640), (80, 263874), (85, 248352), (96, 219895), (102, 206960), (104, 202980), (120, 175916), (130, 162384), (136, 155220), (156, 135320), (160, 131937), (170, 124176), (195, 108256), (199, 106080), (204, 103480), (208, 101490), (221, 95520), (240, 87958), (255, 82784), (260, 81192), (272, 77610), (312, 67660), (340, 62088), (390, 54128), (398, 53040), (408, 51740), (416, 50745), (442, 47760), (480, 43979), (510, 41392), (520, 40596), (544, 38805), (597, 35360), (624, 33830), (663, 31840), (680, 31044), (780, 27064), (796, 26520), (816, 25870), (884, 23880), (995, 21216), (1020, 20696), (1040, 20298), (1105, 19104), (1194, 17680), (1248, 16915), (1326, 15920), (1360, 15522), (1560, 13532), (1592, 13260), (1632, 12935), (1768, 11940), (1990, 10608), (2040, 10348), (2080, 10149), (2210, 9552), (2388, 8840), (2587, 8160), (2652, 7960), (2720, 7761), (2985, 7072), (3120, 6766), (3184, 6630), (3315, 6368), (3383, 6240), (3536, 5970), (3980, 5304), (4080, 5174), (4420, 4776)]