20921760

素因数分解:

$2^5\times 3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{167}}^1$

素因数の和:220

約数の個数: 192

約数和(自身を含む): 76204800

約数和(自身を除く): 55283040

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 29, 30, 32, 36, 40, 45, 48, 54, 58, 60, 72, 80, 87, 90, 96, 108, 116, 120, 135, 144, 145, 160, 167, 174, 180, 216, 232, 240, 261, 270, 288, 290, 334, 348, 360, 432, 435, 464, 480, 501, 522, 540, 580, 668, 696, 720, 783, 835, 864, 870, 928, 1002, 1044, 1080, 1160, 1305, 1336, 1392, 1440, 1503, 1566, 1670, 1740, 2004, 2088, 2160, 2320, 2505, 2610, 2672, 2784, 3006, 3132, 3340, 3480, 3915, 4008, 4176, 4320, 4509, 4640, 4843, 5010, 5220, 5344, 6012, 6264, 6680, 6960, 7515, 7830, 8016, 8352, 9018, 9686, 10020, 10440, 12024, 12528, 13360, 13920, 14529, 15030, 15660, 16032, 18036, 19372, 20040, 20880, 22545, 24048, 24215, 25056, 26720, 29058, 30060, 31320, 36072, 38744, 40080, 41760, 43587, 45090, 48096, 48430, 58116, 60120, 62640, 72144, 72645, 77488, 80160, 87174, 90180, 96860, 116232, 120240, 125280, 130761, 144288, 145290, 154976, 174348, 180360, 193720, 217935, 232464, 240480, 261522, 290580, 348696, 360720, 387440, 435870, 464928, 523044, 581160, 653805, 697392, 721440, 774880, 871740, 1046088, 1162320, 1307610, 1394784, 1743480, 2092176, 2324640, 2615220, 3486960, 4184352, 5230440, 6973920, 10460880, 20921760]

約数ペア:

[(1, 20921760), (2, 10460880), (3, 6973920), (4, 5230440), (5, 4184352), (6, 3486960), (8, 2615220), (9, 2324640), (10, 2092176), (12, 1743480), (15, 1394784), (16, 1307610), (18, 1162320), (20, 1046088), (24, 871740), (27, 774880), (29, 721440), (30, 697392), (32, 653805), (36, 581160), (40, 523044), (45, 464928), (48, 435870), (54, 387440), (58, 360720), (60, 348696), (72, 290580), (80, 261522), (87, 240480), (90, 232464), (96, 217935), (108, 193720), (116, 180360), (120, 174348), (135, 154976), (144, 145290), (145, 144288), (160, 130761), (167, 125280), (174, 120240), (180, 116232), (216, 96860), (232, 90180), (240, 87174), (261, 80160), (270, 77488), (288, 72645), (290, 72144), (334, 62640), (348, 60120), (360, 58116), (432, 48430), (435, 48096), (464, 45090), (480, 43587), (501, 41760), (522, 40080), (540, 38744), (580, 36072), (668, 31320), (696, 30060), (720, 29058), (783, 26720), (835, 25056), (864, 24215), (870, 24048), (928, 22545), (1002, 20880), (1044, 20040), (1080, 19372), (1160, 18036), (1305, 16032), (1336, 15660), (1392, 15030), (1440, 14529), (1503, 13920), (1566, 13360), (1670, 12528), (1740, 12024), (2004, 10440), (2088, 10020), (2160, 9686), (2320, 9018), (2505, 8352), (2610, 8016), (2672, 7830), (2784, 7515), (3006, 6960), (3132, 6680), (3340, 6264), (3480, 6012), (3915, 5344), (4008, 5220), (4176, 5010), (4320, 4843), (4509, 4640)]