21878031

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{61283}}^1$

素因数の和:61310

約数の個数: 16

約数和(自身を含む): 35299584

約数和(自身を除く): 13421553

約数列:

[1, 3, 7, 17, 21, 51, 119, 357, 61283, 183849, 428981, 1041811, 1286943, 3125433, 7292677, 21878031]

約数ペア:

[(1, 21878031), (3, 7292677), (7, 3125433), (17, 1286943), (21, 1041811), (51, 428981), (119, 183849), (357, 61283)]