21162757

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:182

約数の個数: 32

約数和(自身を含む): 27648000

約数和(自身を除く): 6485243

約数列:

[1, 7, 11, 49, 71, 77, 79, 343, 497, 539, 553, 781, 869, 3479, 3773, 3871, 5467, 5609, 6083, 24353, 27097, 38269, 39263, 42581, 61699, 267883, 274841, 298067, 431893, 1923887, 3023251, 21162757]

約数ペア:

[(1, 21162757), (7, 3023251), (11, 1923887), (49, 431893), (71, 298067), (77, 274841), (79, 267883), (343, 61699), (497, 42581), (539, 39263), (553, 38269), (781, 27097), (869, 24353), (3479, 6083), (3773, 5609), (3871, 5467)]