20393289

素因数分解:

$3^5\times 7^1\times {\mathrm{19}}^1\times {\mathrm{631}}^1$

素因数の和:672

約数の個数: 48

約数和(自身を含む): 36807680

約数和(自身を除く): 16414391

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 81, 133, 171, 189, 243, 399, 513, 567, 631, 1197, 1539, 1701, 1893, 3591, 4417, 4617, 5679, 10773, 11989, 13251, 17037, 32319, 35967, 39753, 51111, 83923, 107901, 119259, 153333, 251769, 323703, 357777, 755307, 971109, 1073331, 2265921, 2913327, 6797763, 20393289]

約数ペア:

[(1, 20393289), (3, 6797763), (7, 2913327), (9, 2265921), (19, 1073331), (21, 971109), (27, 755307), (57, 357777), (63, 323703), (81, 251769), (133, 153333), (171, 119259), (189, 107901), (243, 83923), (399, 51111), (513, 39753), (567, 35967), (631, 32319), (1197, 17037), (1539, 13251), (1701, 11989), (1893, 10773), (3591, 5679), (4417, 4617)]