21247520

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{311}}^1$

素因数の和:394

約数の個数: 96

約数和(自身を含む): 58496256

約数和(自身を除く): 37248736

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 61, 70, 80, 112, 122, 140, 160, 224, 244, 280, 305, 311, 427, 488, 560, 610, 622, 854, 976, 1120, 1220, 1244, 1555, 1708, 1952, 2135, 2177, 2440, 2488, 3110, 3416, 4270, 4354, 4880, 4976, 6220, 6832, 8540, 8708, 9760, 9952, 10885, 12440, 13664, 17080, 17416, 18971, 21770, 24880, 34160, 34832, 37942, 43540, 49760, 68320, 69664, 75884, 87080, 94855, 132797, 151768, 174160, 189710, 265594, 303536, 348320, 379420, 531188, 607072, 663985, 758840, 1062376, 1327970, 1517680, 2124752, 2655940, 3035360, 4249504, 5311880, 10623760, 21247520]

約数ペア:

[(1, 21247520), (2, 10623760), (4, 5311880), (5, 4249504), (7, 3035360), (8, 2655940), (10, 2124752), (14, 1517680), (16, 1327970), (20, 1062376), (28, 758840), (32, 663985), (35, 607072), (40, 531188), (56, 379420), (61, 348320), (70, 303536), (80, 265594), (112, 189710), (122, 174160), (140, 151768), (160, 132797), (224, 94855), (244, 87080), (280, 75884), (305, 69664), (311, 68320), (427, 49760), (488, 43540), (560, 37942), (610, 34832), (622, 34160), (854, 24880), (976, 21770), (1120, 18971), (1220, 17416), (1244, 17080), (1555, 13664), (1708, 12440), (1952, 10885), (2135, 9952), (2177, 9760), (2440, 8708), (2488, 8540), (3110, 6832), (3416, 6220), (4270, 4976), (4354, 4880)]