20989868940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{311}}^1\times {\mathrm{374953}}^1$

素因数の和:375279

約数の個数: 72

約数和(自身を含む): 63874163808

約数和(自身を除く): 42884294868

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 311, 622, 933, 1244, 1555, 1866, 2799, 3110, 3732, 4665, 5598, 6220, 9330, 11196, 13995, 18660, 27990, 55980, 374953, 749906, 1124859, 1499812, 1874765, 2249718, 3374577, 3749530, 4499436, 5624295, 6749154, 7499060, 11248590, 13498308, 16872885, 22497180, 33745770, 67491540, 116610383, 233220766, 349831149, 466441532, 583051915, 699662298, 1049493447, 1166103830, 1399324596, 1749155745, 2098986894, 2332207660, 3498311490, 4197973788, 5247467235, 6996622980, 10494934470, 20989868940]

約数ペア:

[(1, 20989868940), (2, 10494934470), (3, 6996622980), (4, 5247467235), (5, 4197973788), (6, 3498311490), (9, 2332207660), (10, 2098986894), (12, 1749155745), (15, 1399324596), (18, 1166103830), (20, 1049493447), (30, 699662298), (36, 583051915), (45, 466441532), (60, 349831149), (90, 233220766), (180, 116610383), (311, 67491540), (622, 33745770), (933, 22497180), (1244, 16872885), (1555, 13498308), (1866, 11248590), (2799, 7499060), (3110, 6749154), (3732, 5624295), (4665, 4499436), (5598, 3749530), (6220, 3374577), (9330, 2249718), (11196, 1874765), (13995, 1499812), (18660, 1124859), (27990, 749906), (55980, 374953)]