21291445

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{26449}}^1$

素因数の和:26484

約数の個数: 16

約数和(自身を含む): 30470400

約数和(自身を除く): 9178955

約数列:

[1, 5, 7, 23, 35, 115, 161, 805, 26449, 132245, 185143, 608327, 925715, 3041635, 4258289, 21291445]

約数ペア:

[(1, 21291445), (5, 4258289), (7, 3041635), (23, 925715), (35, 608327), (115, 185143), (161, 132245), (805, 26449)]