20686320

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1$

素因数の和:240

約数の個数: 160

約数和(自身を含む): 72882240

約数和(自身を除く): 52195920

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 36, 40, 45, 48, 54, 60, 61, 72, 80, 90, 108, 120, 122, 135, 144, 157, 180, 183, 216, 240, 244, 270, 305, 314, 360, 366, 432, 471, 488, 540, 549, 610, 628, 720, 732, 785, 915, 942, 976, 1080, 1098, 1220, 1256, 1413, 1464, 1570, 1647, 1830, 1884, 2160, 2196, 2355, 2440, 2512, 2745, 2826, 2928, 3140, 3294, 3660, 3768, 4239, 4392, 4710, 4880, 5490, 5652, 6280, 6588, 7065, 7320, 7536, 8235, 8478, 8784, 9420, 9577, 10980, 11304, 12560, 13176, 14130, 14640, 16470, 16956, 18840, 19154, 21195, 21960, 22608, 26352, 28260, 28731, 32940, 33912, 37680, 38308, 42390, 43920, 47885, 56520, 57462, 65880, 67824, 76616, 84780, 86193, 95770, 113040, 114924, 131760, 143655, 153232, 169560, 172386, 191540, 229848, 258579, 287310, 339120, 344772, 383080, 430965, 459696, 517158, 574620, 689544, 766160, 861930, 1034316, 1149240, 1292895, 1379088, 1723860, 2068632, 2298480, 2585790, 3447720, 4137264, 5171580, 6895440, 10343160, 20686320]

約数ペア:

[(1, 20686320), (2, 10343160), (3, 6895440), (4, 5171580), (5, 4137264), (6, 3447720), (8, 2585790), (9, 2298480), (10, 2068632), (12, 1723860), (15, 1379088), (16, 1292895), (18, 1149240), (20, 1034316), (24, 861930), (27, 766160), (30, 689544), (36, 574620), (40, 517158), (45, 459696), (48, 430965), (54, 383080), (60, 344772), (61, 339120), (72, 287310), (80, 258579), (90, 229848), (108, 191540), (120, 172386), (122, 169560), (135, 153232), (144, 143655), (157, 131760), (180, 114924), (183, 113040), (216, 95770), (240, 86193), (244, 84780), (270, 76616), (305, 67824), (314, 65880), (360, 57462), (366, 56520), (432, 47885), (471, 43920), (488, 42390), (540, 38308), (549, 37680), (610, 33912), (628, 32940), (720, 28731), (732, 28260), (785, 26352), (915, 22608), (942, 21960), (976, 21195), (1080, 19154), (1098, 18840), (1220, 16956), (1256, 16470), (1413, 14640), (1464, 14130), (1570, 13176), (1647, 12560), (1830, 11304), (1884, 10980), (2160, 9577), (2196, 9420), (2355, 8784), (2440, 8478), (2512, 8235), (2745, 7536), (2826, 7320), (2928, 7065), (3140, 6588), (3294, 6280), (3660, 5652), (3768, 5490), (4239, 4880), (4392, 4710)]