21980105

素因数分解:

$5^1\times 7^1\times {\mathrm{379}}^1\times {\mathrm{1657}}^1$

素因数の和:2048

約数の個数: 16

約数和(自身を含む): 30241920

約数和(自身を除く): 8261815

約数列:

[1, 5, 7, 35, 379, 1657, 1895, 2653, 8285, 11599, 13265, 57995, 628003, 3140015, 4396021, 21980105]

約数ペア:

[(1, 21980105), (5, 4396021), (7, 3140015), (35, 628003), (379, 57995), (1657, 13265), (1895, 11599), (2653, 8285)]