19181781

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{137}}^1\times {\mathrm{331}}^1$

素因数の和:521

約数の個数: 24

約数和(自身を含む): 28589184

約数和(自身を除く): 9407403

約数列:

[1, 3, 9, 47, 137, 141, 331, 411, 423, 993, 1233, 2979, 6439, 15557, 19317, 45347, 46671, 57951, 136041, 140013, 408123, 2131309, 6393927, 19181781]

約数ペア:

[(1, 19181781), (3, 6393927), (9, 2131309), (47, 408123), (137, 140013), (141, 136041), (331, 57951), (411, 46671), (423, 45347), (993, 19317), (1233, 15557), (2979, 6439)]