21276640

素因数分解:

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

素因数の和:201

約数の個数: 144

約数和(自身を含む): 63546336

約数和(自身を除く): 42269696

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 32, 35, 40, 44, 55, 56, 70, 77, 80, 88, 110, 112, 121, 140, 154, 157, 160, 176, 220, 224, 242, 280, 308, 314, 352, 385, 440, 484, 560, 605, 616, 628, 770, 785, 847, 880, 968, 1099, 1120, 1210, 1232, 1256, 1540, 1570, 1694, 1727, 1760, 1936, 2198, 2420, 2464, 2512, 3080, 3140, 3388, 3454, 3872, 4235, 4396, 4840, 5024, 5495, 6160, 6280, 6776, 6908, 8470, 8635, 8792, 9680, 10990, 12089, 12320, 12560, 13552, 13816, 16940, 17270, 17584, 18997, 19360, 21980, 24178, 25120, 27104, 27632, 33880, 34540, 35168, 37994, 43960, 48356, 55264, 60445, 67760, 69080, 75988, 87920, 94985, 96712, 120890, 132979, 135520, 138160, 151976, 175840, 189970, 193424, 241780, 265958, 276320, 303952, 379940, 386848, 483560, 531916, 607904, 664895, 759880, 967120, 1063832, 1329790, 1519760, 1934240, 2127664, 2659580, 3039520, 4255328, 5319160, 10638320, 21276640]

約数ペア:

[(1, 21276640), (2, 10638320), (4, 5319160), (5, 4255328), (7, 3039520), (8, 2659580), (10, 2127664), (11, 1934240), (14, 1519760), (16, 1329790), (20, 1063832), (22, 967120), (28, 759880), (32, 664895), (35, 607904), (40, 531916), (44, 483560), (55, 386848), (56, 379940), (70, 303952), (77, 276320), (80, 265958), (88, 241780), (110, 193424), (112, 189970), (121, 175840), (140, 151976), (154, 138160), (157, 135520), (160, 132979), (176, 120890), (220, 96712), (224, 94985), (242, 87920), (280, 75988), (308, 69080), (314, 67760), (352, 60445), (385, 55264), (440, 48356), (484, 43960), (560, 37994), (605, 35168), (616, 34540), (628, 33880), (770, 27632), (785, 27104), (847, 25120), (880, 24178), (968, 21980), (1099, 19360), (1120, 18997), (1210, 17584), (1232, 17270), (1256, 16940), (1540, 13816), (1570, 13552), (1694, 12560), (1727, 12320), (1760, 12089), (1936, 10990), (2198, 9680), (2420, 8792), (2464, 8635), (2512, 8470), (3080, 6908), (3140, 6776), (3388, 6280), (3454, 6160), (3872, 5495), (4235, 5024), (4396, 4840)]