28062980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{641}}^1$

素因数の和:860

約数の個数: 48

約数和(自身を含む): 64713600

約数和(自身を除く): 36650620

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 199, 220, 398, 641, 796, 995, 1282, 1990, 2189, 2564, 3205, 3980, 4378, 6410, 7051, 8756, 10945, 12820, 14102, 21890, 28204, 35255, 43780, 70510, 127559, 141020, 255118, 510236, 637795, 1275590, 1403149, 2551180, 2806298, 5612596, 7015745, 14031490, 28062980]

約数ペア:

[(1, 28062980), (2, 14031490), (4, 7015745), (5, 5612596), (10, 2806298), (11, 2551180), (20, 1403149), (22, 1275590), (44, 637795), (55, 510236), (110, 255118), (199, 141020), (220, 127559), (398, 70510), (641, 43780), (796, 35255), (995, 28204), (1282, 21890), (1990, 14102), (2189, 12820), (2564, 10945), (3205, 8756), (3980, 7051), (4378, 6410)]