21189818

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{7477}}^1$

素因数の和:7601

約数の個数: 16

約数和(自身を含む): 34548360

約数和(自身を除く): 13358542

約数列:

[1, 2, 13, 26, 109, 218, 1417, 2834, 7477, 14954, 97201, 194402, 814993, 1629986, 10594909, 21189818]

約数ペア:

[(1, 21189818), (2, 10594909), (13, 1629986), (26, 814993), (109, 194402), (218, 97201), (1417, 14954), (2834, 7477)]