21053955

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{1069}}^1$

素因数の和:1191

約数の個数: 32

約数和(自身を含む): 36671040

約数和(自身を除く): 15617085

約数列:

[1, 3, 5, 13, 15, 39, 65, 101, 195, 303, 505, 1069, 1313, 1515, 3207, 3939, 5345, 6565, 13897, 16035, 19695, 41691, 69485, 107969, 208455, 323907, 539845, 1403597, 1619535, 4210791, 7017985, 21053955]

約数ペア:

[(1, 21053955), (3, 7017985), (5, 4210791), (13, 1619535), (15, 1403597), (39, 539845), (65, 323907), (101, 208455), (195, 107969), (303, 69485), (505, 41691), (1069, 19695), (1313, 16035), (1515, 13897), (3207, 6565), (3939, 5345)]