19917990505

素因数分解:

$5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{1201}}^1\times {\mathrm{6491}}^1$

素因数の和:7777

約数の個数: 32

約数和(自身を含む): 27717619968

約数和(自身を除く): 7799629463

約数列:

[1, 5, 7, 35, 73, 365, 511, 1201, 2555, 6005, 6491, 8407, 32455, 42035, 45437, 87673, 227185, 438365, 473843, 613711, 2369215, 3068555, 3316901, 7795691, 16584505, 38978455, 54569837, 272849185, 569085443, 2845427215, 3983598101, 19917990505]

約数ペア:

[(1, 19917990505), (5, 3983598101), (7, 2845427215), (35, 569085443), (73, 272849185), (365, 54569837), (511, 38978455), (1201, 16584505), (2555, 7795691), (6005, 3316901), (6491, 3068555), (8407, 2369215), (32455, 613711), (42035, 473843), (45437, 438365), (87673, 227185)]