21017290

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{300247}}^1$

素因数の和:300261

約数の個数: 16

約数和(自身を含む): 43235712

約数和(自身を除く): 22218422

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 300247, 600494, 1501235, 2101729, 3002470, 4203458, 10508645, 21017290]

約数ペア:

[(1, 21017290), (2, 10508645), (5, 4203458), (7, 3002470), (10, 2101729), (14, 1501235), (35, 600494), (70, 300247)]