1640392820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{199}}^1\times {\mathrm{421}}^1$

素因数の和:729

約数の個数: 96

約数和(自身を含む): 3828384000

約数和(自身を除く): 2187991180

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 199, 220, 356, 398, 421, 445, 796, 842, 890, 979, 995, 1684, 1780, 1958, 1990, 2105, 2189, 3916, 3980, 4210, 4378, 4631, 4895, 8420, 8756, 9262, 9790, 10945, 17711, 18524, 19580, 21890, 23155, 35422, 37469, 43780, 46310, 70844, 74938, 83779, 88555, 92620, 149876, 167558, 177110, 187345, 194821, 335116, 354220, 374690, 389642, 412159, 418895, 749380, 779284, 824318, 837790, 921569, 974105, 1648636, 1675580, 1843138, 1948210, 2060795, 3686276, 3896420, 4121590, 4607845, 7456331, 8243180, 9215690, 14912662, 18431380, 29825324, 37281655, 74563310, 82019641, 149126620, 164039282, 328078564, 410098205, 820196410, 1640392820]

約数ペア:

[(1, 1640392820), (2, 820196410), (4, 410098205), (5, 328078564), (10, 164039282), (11, 149126620), (20, 82019641), (22, 74563310), (44, 37281655), (55, 29825324), (89, 18431380), (110, 14912662), (178, 9215690), (199, 8243180), (220, 7456331), (356, 4607845), (398, 4121590), (421, 3896420), (445, 3686276), (796, 2060795), (842, 1948210), (890, 1843138), (979, 1675580), (995, 1648636), (1684, 974105), (1780, 921569), (1958, 837790), (1990, 824318), (2105, 779284), (2189, 749380), (3916, 418895), (3980, 412159), (4210, 389642), (4378, 374690), (4631, 354220), (4895, 335116), (8420, 194821), (8756, 187345), (9262, 177110), (9790, 167558), (10945, 149876), (17711, 92620), (18524, 88555), (19580, 83779), (21890, 74938), (23155, 70844), (35422, 46310), (37469, 43780)]