19911913

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{1123}}^1$

素因数の和:1296

約数の個数: 16

約数和(自身を含む): 24278400

約数和(自身を除く): 4366487

約数列:

[1, 7, 17, 119, 149, 1043, 1123, 2533, 7861, 17731, 19091, 133637, 167327, 1171289, 2844559, 19911913]

約数ペア:

[(1, 19911913), (7, 2844559), (17, 1171289), (119, 167327), (149, 133637), (1043, 19091), (1123, 17731), (2533, 7861)]