21181914

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{691}}^1$

素因数の和:843

約数の個数: 48

約数和(自身を含む): 49873824

約数和(自身を除く): 28691910

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 78, 117, 131, 234, 262, 393, 691, 786, 1179, 1382, 1703, 2073, 2358, 3406, 4146, 5109, 6219, 8983, 10218, 12438, 15327, 17966, 26949, 30654, 53898, 80847, 90521, 161694, 181042, 271563, 543126, 814689, 1176773, 1629378, 2353546, 3530319, 7060638, 10590957, 21181914]

約数ペア:

[(1, 21181914), (2, 10590957), (3, 7060638), (6, 3530319), (9, 2353546), (13, 1629378), (18, 1176773), (26, 814689), (39, 543126), (78, 271563), (117, 181042), (131, 161694), (234, 90521), (262, 80847), (393, 53898), (691, 30654), (786, 26949), (1179, 17966), (1382, 15327), (1703, 12438), (2073, 10218), (2358, 8983), (3406, 6219), (4146, 5109)]