20915961

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{113}}^1$

素因数の和:277

約数の個数: 32

約数和(自身を含む): 31518720

約数和(自身を除く): 10602759

約数列:

[1, 3, 11, 33, 71, 79, 113, 213, 237, 339, 781, 869, 1243, 2343, 2607, 3729, 5609, 8023, 8927, 16827, 24069, 26781, 61699, 88253, 98197, 185097, 264759, 294591, 633817, 1901451, 6971987, 20915961]

約数ペア:

[(1, 20915961), (3, 6971987), (11, 1901451), (33, 633817), (71, 294591), (79, 264759), (113, 185097), (213, 98197), (237, 88253), (339, 61699), (781, 26781), (869, 24069), (1243, 16827), (2343, 8927), (2607, 8023), (3729, 5609)]