21280418

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{5437}}^1$

素因数の和:5561

約数の個数: 16

約数和(自身を含む): 33933120

約数和(自身を除く): 12652702

約数列:

[1, 2, 19, 38, 103, 206, 1957, 3914, 5437, 10874, 103303, 206606, 560011, 1120022, 10640209, 21280418]

約数ペア:

[(1, 21280418), (2, 10640209), (19, 1120022), (38, 560011), (103, 206606), (206, 103303), (1957, 10874), (3914, 5437)]