20818080

素因数分解:

$2^5\times 3^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:164

約数の個数: 192

約数和(自身を含む): 74995200

約数和(自身を除く): 54177120

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 48, 54, 60, 61, 72, 79, 80, 90, 96, 108, 120, 122, 135, 144, 158, 160, 180, 183, 216, 237, 240, 244, 270, 288, 305, 316, 360, 366, 395, 432, 474, 480, 488, 540, 549, 610, 632, 711, 720, 732, 790, 864, 915, 948, 976, 1080, 1098, 1185, 1220, 1264, 1422, 1440, 1464, 1580, 1647, 1830, 1896, 1952, 2133, 2160, 2196, 2370, 2440, 2528, 2745, 2844, 2928, 3160, 3294, 3555, 3660, 3792, 4266, 4320, 4392, 4740, 4819, 4880, 5490, 5688, 5856, 6320, 6588, 7110, 7320, 7584, 8235, 8532, 8784, 9480, 9638, 9760, 10665, 10980, 11376, 12640, 13176, 14220, 14457, 14640, 16470, 17064, 17568, 18960, 19276, 21330, 21960, 22752, 24095, 26352, 28440, 28914, 29280, 32940, 34128, 37920, 38552, 42660, 43371, 43920, 48190, 52704, 56880, 57828, 65880, 68256, 72285, 77104, 85320, 86742, 87840, 96380, 113760, 115656, 130113, 131760, 144570, 154208, 170640, 173484, 192760, 216855, 231312, 260226, 263520, 289140, 341280, 346968, 385520, 433710, 462624, 520452, 578280, 650565, 693936, 771040, 867420, 1040904, 1156560, 1301130, 1387872, 1734840, 2081808, 2313120, 2602260, 3469680, 4163616, 5204520, 6939360, 10409040, 20818080]

約数ペア:

[(1, 20818080), (2, 10409040), (3, 6939360), (4, 5204520), (5, 4163616), (6, 3469680), (8, 2602260), (9, 2313120), (10, 2081808), (12, 1734840), (15, 1387872), (16, 1301130), (18, 1156560), (20, 1040904), (24, 867420), (27, 771040), (30, 693936), (32, 650565), (36, 578280), (40, 520452), (45, 462624), (48, 433710), (54, 385520), (60, 346968), (61, 341280), (72, 289140), (79, 263520), (80, 260226), (90, 231312), (96, 216855), (108, 192760), (120, 173484), (122, 170640), (135, 154208), (144, 144570), (158, 131760), (160, 130113), (180, 115656), (183, 113760), (216, 96380), (237, 87840), (240, 86742), (244, 85320), (270, 77104), (288, 72285), (305, 68256), (316, 65880), (360, 57828), (366, 56880), (395, 52704), (432, 48190), (474, 43920), (480, 43371), (488, 42660), (540, 38552), (549, 37920), (610, 34128), (632, 32940), (711, 29280), (720, 28914), (732, 28440), (790, 26352), (864, 24095), (915, 22752), (948, 21960), (976, 21330), (1080, 19276), (1098, 18960), (1185, 17568), (1220, 17064), (1264, 16470), (1422, 14640), (1440, 14457), (1464, 14220), (1580, 13176), (1647, 12640), (1830, 11376), (1896, 10980), (1952, 10665), (2133, 9760), (2160, 9638), (2196, 9480), (2370, 8784), (2440, 8532), (2528, 8235), (2745, 7584), (2844, 7320), (2928, 7110), (3160, 6588), (3294, 6320), (3555, 5856), (3660, 5688), (3792, 5490), (4266, 4880), (4320, 4819), (4392, 4740)]