20857760

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{1693}}^1$

素因数の和:1726

約数の個数: 96

約数和(自身を含む): 61471872

約数和(自身を除く): 40614112

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, 140, 154, 160, 176, 220, 224, 280, 308, 352, 385, 440, 560, 616, 770, 880, 1120, 1232, 1540, 1693, 1760, 2464, 3080, 3386, 6160, 6772, 8465, 11851, 12320, 13544, 16930, 18623, 23702, 27088, 33860, 37246, 47404, 54176, 59255, 67720, 74492, 93115, 94808, 118510, 130361, 135440, 148984, 186230, 189616, 237020, 260722, 270880, 297968, 372460, 379232, 474040, 521444, 595936, 651805, 744920, 948080, 1042888, 1303610, 1489840, 1896160, 2085776, 2607220, 2979680, 4171552, 5214440, 10428880, 20857760]

約数ペア:

[(1, 20857760), (2, 10428880), (4, 5214440), (5, 4171552), (7, 2979680), (8, 2607220), (10, 2085776), (11, 1896160), (14, 1489840), (16, 1303610), (20, 1042888), (22, 948080), (28, 744920), (32, 651805), (35, 595936), (40, 521444), (44, 474040), (55, 379232), (56, 372460), (70, 297968), (77, 270880), (80, 260722), (88, 237020), (110, 189616), (112, 186230), (140, 148984), (154, 135440), (160, 130361), (176, 118510), (220, 94808), (224, 93115), (280, 74492), (308, 67720), (352, 59255), (385, 54176), (440, 47404), (560, 37246), (616, 33860), (770, 27088), (880, 23702), (1120, 18623), (1232, 16930), (1540, 13544), (1693, 12320), (1760, 11851), (2464, 8465), (3080, 6772), (3386, 6160)]