20815731

素因数分解:

$3^3\times {\mathrm{59}}^1\times {\mathrm{73}}^1\times {\mathrm{179}}^1$

素因数の和:320

約数の個数: 32

約数和(自身を含む): 31968000

約数和(自身を除く): 11152269

約数列:

[1, 3, 9, 27, 59, 73, 177, 179, 219, 531, 537, 657, 1593, 1611, 1971, 4307, 4833, 10561, 12921, 13067, 31683, 38763, 39201, 95049, 116289, 117603, 285147, 352809, 770953, 2312859, 6938577, 20815731]

約数ペア:

[(1, 20815731), (3, 6938577), (9, 2312859), (27, 770953), (59, 352809), (73, 285147), (177, 117603), (179, 116289), (219, 95049), (531, 39201), (537, 38763), (657, 31683), (1593, 13067), (1611, 12921), (1971, 10561), (4307, 4833)]