18757640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{479}}^1$

素因数の和:590

約数の個数: 64

約数和(自身を含む): 46656000

約数和(自身を除く): 27898360

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 89, 110, 178, 220, 356, 440, 445, 479, 712, 890, 958, 979, 1780, 1916, 1958, 2395, 3560, 3832, 3916, 4790, 4895, 5269, 7832, 9580, 9790, 10538, 19160, 19580, 21076, 26345, 39160, 42152, 42631, 52690, 85262, 105380, 170524, 210760, 213155, 341048, 426310, 468941, 852620, 937882, 1705240, 1875764, 2344705, 3751528, 4689410, 9378820, 18757640]

約数ペア:

[(1, 18757640), (2, 9378820), (4, 4689410), (5, 3751528), (8, 2344705), (10, 1875764), (11, 1705240), (20, 937882), (22, 852620), (40, 468941), (44, 426310), (55, 341048), (88, 213155), (89, 210760), (110, 170524), (178, 105380), (220, 85262), (356, 52690), (440, 42631), (445, 42152), (479, 39160), (712, 26345), (890, 21076), (958, 19580), (979, 19160), (1780, 10538), (1916, 9790), (1958, 9580), (2395, 7832), (3560, 5269), (3832, 4895), (3916, 4790)]