21243520

素因数分解:

$2^7\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1747}}^1$

素因数の和:1785

約数の個数: 64

約数和(自身を含む): 53488800

約数和(自身を除く): 32245280

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 304, 320, 380, 608, 640, 760, 1216, 1520, 1747, 2432, 3040, 3494, 6080, 6988, 8735, 12160, 13976, 17470, 27952, 33193, 34940, 55904, 66386, 69880, 111808, 132772, 139760, 165965, 223616, 265544, 279520, 331930, 531088, 559040, 663860, 1062176, 1118080, 1327720, 2124352, 2655440, 4248704, 5310880, 10621760, 21243520]

約数ペア:

[(1, 21243520), (2, 10621760), (4, 5310880), (5, 4248704), (8, 2655440), (10, 2124352), (16, 1327720), (19, 1118080), (20, 1062176), (32, 663860), (38, 559040), (40, 531088), (64, 331930), (76, 279520), (80, 265544), (95, 223616), (128, 165965), (152, 139760), (160, 132772), (190, 111808), (304, 69880), (320, 66386), (380, 55904), (608, 34940), (640, 33193), (760, 27952), (1216, 17470), (1520, 13976), (1747, 12160), (2432, 8735), (3040, 6988), (3494, 6080)]