20211687

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{571}}^1$

素因数の和:625

約数の個数: 40

約数和(自身を含む): 33221760

約数和(自身を除く): 13010073

約数列:

[1, 3, 9, 19, 23, 27, 57, 69, 81, 171, 207, 437, 513, 571, 621, 1311, 1539, 1713, 1863, 3933, 5139, 10849, 11799, 13133, 15417, 32547, 35397, 39399, 46251, 97641, 118197, 249527, 292923, 354591, 748581, 878769, 1063773, 2245743, 6737229, 20211687]

約数ペア:

[(1, 20211687), (3, 6737229), (9, 2245743), (19, 1063773), (23, 878769), (27, 748581), (57, 354591), (69, 292923), (81, 249527), (171, 118197), (207, 97641), (437, 46251), (513, 39399), (571, 35397), (621, 32547), (1311, 15417), (1539, 13133), (1713, 11799), (1863, 10849), (3933, 5139)]