21075780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{2903}}^1$

素因数の和:2937

約数の個数: 72

約数和(自身を含む): 64886976

約数和(自身を除く): 43811196

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 121, 132, 165, 220, 242, 330, 363, 484, 605, 660, 726, 1210, 1452, 1815, 2420, 2903, 3630, 5806, 7260, 8709, 11612, 14515, 17418, 29030, 31933, 34836, 43545, 58060, 63866, 87090, 95799, 127732, 159665, 174180, 191598, 319330, 351263, 383196, 478995, 638660, 702526, 957990, 1053789, 1405052, 1756315, 1915980, 2107578, 3512630, 4215156, 5268945, 7025260, 10537890, 21075780]

約数ペア:

[(1, 21075780), (2, 10537890), (3, 7025260), (4, 5268945), (5, 4215156), (6, 3512630), (10, 2107578), (11, 1915980), (12, 1756315), (15, 1405052), (20, 1053789), (22, 957990), (30, 702526), (33, 638660), (44, 478995), (55, 383196), (60, 351263), (66, 319330), (110, 191598), (121, 174180), (132, 159665), (165, 127732), (220, 95799), (242, 87090), (330, 63866), (363, 58060), (484, 43545), (605, 34836), (660, 31933), (726, 29030), (1210, 17418), (1452, 14515), (1815, 11612), (2420, 8709), (2903, 7260), (3630, 5806)]