20979567

素因数分解:

$3^4\times 7^1\times {\mathrm{163}}^1\times {\mathrm{227}}^1$

素因数の和:409

約数の個数: 40

約数和(自身を含む): 36195456

約数和(自身を除く): 15215889

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 163, 189, 227, 489, 567, 681, 1141, 1467, 1589, 2043, 3423, 4401, 4767, 6129, 10269, 13203, 14301, 18387, 30807, 37001, 42903, 92421, 111003, 128709, 259007, 333009, 777021, 999027, 2331063, 2997081, 6993189, 20979567]

約数ペア:

[(1, 20979567), (3, 6993189), (7, 2997081), (9, 2331063), (21, 999027), (27, 777021), (63, 333009), (81, 259007), (163, 128709), (189, 111003), (227, 92421), (489, 42903), (567, 37001), (681, 30807), (1141, 18387), (1467, 14301), (1589, 13203), (2043, 10269), (3423, 6129), (4401, 4767)]