19890759

素因数分解:

$3^1\times 7^1\times {\mathrm{67}}^2\times {\mathrm{211}}^1$

素因数の和:355

約数の個数: 24

約数和(自身を含む): 30914688

約数和(自身を除く): 11023929

約数列:

[1, 3, 7, 21, 67, 201, 211, 469, 633, 1407, 1477, 4431, 4489, 13467, 14137, 31423, 42411, 94269, 98959, 296877, 947179, 2841537, 6630253, 19890759]

約数ペア:

[(1, 19890759), (3, 6630253), (7, 2841537), (21, 947179), (67, 296877), (201, 98959), (211, 94269), (469, 42411), (633, 31423), (1407, 14137), (1477, 13467), (4431, 4489)]