20154520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{277}}^1$

素因数の和:412

約数の個数: 64

約数和(自身を含む): 48638880

約数和(自身を除く): 28484360

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 107, 136, 170, 214, 277, 340, 428, 535, 554, 680, 856, 1070, 1108, 1385, 1819, 2140, 2216, 2770, 3638, 4280, 4709, 5540, 7276, 9095, 9418, 11080, 14552, 18190, 18836, 23545, 29639, 36380, 37672, 47090, 59278, 72760, 94180, 118556, 148195, 188360, 237112, 296390, 503863, 592780, 1007726, 1185560, 2015452, 2519315, 4030904, 5038630, 10077260, 20154520]

約数ペア:

[(1, 20154520), (2, 10077260), (4, 5038630), (5, 4030904), (8, 2519315), (10, 2015452), (17, 1185560), (20, 1007726), (34, 592780), (40, 503863), (68, 296390), (85, 237112), (107, 188360), (136, 148195), (170, 118556), (214, 94180), (277, 72760), (340, 59278), (428, 47090), (535, 37672), (554, 36380), (680, 29639), (856, 23545), (1070, 18836), (1108, 18190), (1385, 14552), (1819, 11080), (2140, 9418), (2216, 9095), (2770, 7276), (3638, 5540), (4280, 4709)]