21951813

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{271}}^1$

素因数の和:385

約数の個数: 32

約数和(自身を含む): 33144832

約数和(自身を除く): 11193019

約数列:

[1, 3, 13, 31, 39, 67, 93, 201, 271, 403, 813, 871, 1209, 2077, 2613, 3523, 6231, 8401, 10569, 18157, 25203, 27001, 54471, 81003, 109213, 236041, 327639, 562867, 708123, 1688601, 7317271, 21951813]

約数ペア:

[(1, 21951813), (3, 7317271), (13, 1688601), (31, 708123), (39, 562867), (67, 327639), (93, 236041), (201, 109213), (271, 81003), (403, 54471), (813, 27001), (871, 25203), (1209, 18157), (2077, 10569), (2613, 8401), (3523, 6231)]