21000775047

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1373}}^1\times {\mathrm{15497}}^1$

素因数の和:16927

約数の個数: 32

約数和(自身を含む): 32707971072

約数和(自身を除く): 11707196025

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 1373, 4119, 9611, 15497, 28833, 46491, 64531, 108479, 193593, 325437, 451717, 728359, 1355151, 2185077, 5098513, 15295539, 21277381, 63832143, 148941667, 446825001, 1000036907, 3000110721, 7000258349, 21000775047]

約数ペア:

[(1, 21000775047), (3, 7000258349), (7, 3000110721), (21, 1000036907), (47, 446825001), (141, 148941667), (329, 63832143), (987, 21277381), (1373, 15295539), (4119, 5098513), (9611, 2185077), (15497, 1355151), (28833, 728359), (46491, 451717), (64531, 325437), (108479, 193593)]