20639529

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{13411}}^1$

素因数の和:13442

約数の個数: 20

約数和(自身を含む): 32457040

約数和(自身を除く): 11817511

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 513, 1539, 13411, 40233, 120699, 254809, 362097, 764427, 1086291, 2293281, 6879843, 20639529]

約数ペア:

[(1, 20639529), (3, 6879843), (9, 2293281), (19, 1086291), (27, 764427), (57, 362097), (81, 254809), (171, 120699), (513, 40233), (1539, 13411)]