21000320

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1$

素因数の和:206

約数の個数: 128

約数和(自身を含む): 58017600

約数和(自身を除く): 37017280

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 32, 38, 40, 44, 55, 64, 76, 80, 88, 95, 110, 128, 152, 157, 160, 176, 190, 209, 220, 304, 314, 320, 352, 380, 418, 440, 608, 628, 640, 704, 760, 785, 836, 880, 1045, 1216, 1256, 1408, 1520, 1570, 1672, 1727, 1760, 2090, 2432, 2512, 2983, 3040, 3140, 3344, 3454, 3520, 4180, 5024, 5966, 6080, 6280, 6688, 6908, 7040, 8360, 8635, 10048, 11932, 12160, 12560, 13376, 13816, 14915, 16720, 17270, 20096, 23864, 25120, 26752, 27632, 29830, 32813, 33440, 34540, 47728, 50240, 55264, 59660, 65626, 66880, 69080, 95456, 100480, 110528, 119320, 131252, 133760, 138160, 164065, 190912, 221056, 238640, 262504, 276320, 328130, 381824, 477280, 525008, 552640, 656260, 954560, 1050016, 1105280, 1312520, 1909120, 2100032, 2625040, 4200064, 5250080, 10500160, 21000320]

約数ペア:

[(1, 21000320), (2, 10500160), (4, 5250080), (5, 4200064), (8, 2625040), (10, 2100032), (11, 1909120), (16, 1312520), (19, 1105280), (20, 1050016), (22, 954560), (32, 656260), (38, 552640), (40, 525008), (44, 477280), (55, 381824), (64, 328130), (76, 276320), (80, 262504), (88, 238640), (95, 221056), (110, 190912), (128, 164065), (152, 138160), (157, 133760), (160, 131252), (176, 119320), (190, 110528), (209, 100480), (220, 95456), (304, 69080), (314, 66880), (320, 65626), (352, 59660), (380, 55264), (418, 50240), (440, 47728), (608, 34540), (628, 33440), (640, 32813), (704, 29830), (760, 27632), (785, 26752), (836, 25120), (880, 23864), (1045, 20096), (1216, 17270), (1256, 16720), (1408, 14915), (1520, 13816), (1570, 13376), (1672, 12560), (1727, 12160), (1760, 11932), (2090, 10048), (2432, 8635), (2512, 8360), (2983, 7040), (3040, 6908), (3140, 6688), (3344, 6280), (3454, 6080), (3520, 5966), (4180, 5024)]