20409697

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{401}}^1\times {\mathrm{661}}^1$

素因数の和:1080

約数の個数: 16

約数和(自身を含む): 25547904

約数和(自身を除く): 5138207

約数列:

[1, 7, 11, 77, 401, 661, 2807, 4411, 4627, 7271, 30877, 50897, 265061, 1855427, 2915671, 20409697]

約数ペア:

[(1, 20409697), (7, 2915671), (11, 1855427), (77, 265061), (401, 50897), (661, 30877), (2807, 7271), (4411, 4627)]