28164280

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{211}}^1$

素因数の和:340

約数の個数: 64

約数和(自身を含む): 65940480

約数和(自身を除く): 37776200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 71, 94, 142, 188, 211, 235, 284, 355, 376, 422, 470, 568, 710, 844, 940, 1055, 1420, 1688, 1880, 2110, 2840, 3337, 4220, 6674, 8440, 9917, 13348, 14981, 16685, 19834, 26696, 29962, 33370, 39668, 49585, 59924, 66740, 74905, 79336, 99170, 119848, 133480, 149810, 198340, 299620, 396680, 599240, 704107, 1408214, 2816428, 3520535, 5632856, 7041070, 14082140, 28164280]

約数ペア:

[(1, 28164280), (2, 14082140), (4, 7041070), (5, 5632856), (8, 3520535), (10, 2816428), (20, 1408214), (40, 704107), (47, 599240), (71, 396680), (94, 299620), (142, 198340), (188, 149810), (211, 133480), (235, 119848), (284, 99170), (355, 79336), (376, 74905), (422, 66740), (470, 59924), (568, 49585), (710, 39668), (844, 33370), (940, 29962), (1055, 26696), (1420, 19834), (1688, 16685), (1880, 14981), (2110, 13348), (2840, 9917), (3337, 8440), (4220, 6674)]