21079779

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{431}}^1$

素因数の和:595

約数の個数: 32

約数和(自身を含む): 34338816

約数和(自身を除く): 13259037

約数列:

[1, 3, 7, 17, 21, 51, 119, 137, 357, 411, 431, 959, 1293, 2329, 2877, 3017, 6987, 7327, 9051, 16303, 21981, 48909, 51289, 59047, 153867, 177141, 413329, 1003799, 1239987, 3011397, 7026593, 21079779]

約数ペア:

[(1, 21079779), (3, 7026593), (7, 3011397), (17, 1239987), (21, 1003799), (51, 413329), (119, 177141), (137, 153867), (357, 59047), (411, 51289), (431, 48909), (959, 21981), (1293, 16303), (2329, 9051), (2877, 7327), (3017, 6987)]