20178613

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{311}}^1$

素因数の和:385

約数の個数: 32

約数和(自身を含む): 26836992

約数和(自身を除く): 6658379

約数列:

[1, 7, 13, 23, 31, 91, 161, 217, 299, 311, 403, 713, 2093, 2177, 2821, 4043, 4991, 7153, 9269, 9641, 28301, 50071, 64883, 67487, 92989, 125333, 221743, 650923, 877331, 1552201, 2882659, 20178613]

約数ペア:

[(1, 20178613), (7, 2882659), (13, 1552201), (23, 877331), (31, 650923), (91, 221743), (161, 125333), (217, 92989), (299, 67487), (311, 64883), (403, 50071), (713, 28301), (2093, 9641), (2177, 9269), (2821, 7153), (4043, 4991)]