199919980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{768923}}^1$

素因数の和:768945

約数の個数: 24

約数和(自身を含む): 452127312

約数和(自身を除く): 252207332

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 768923, 1537846, 3075692, 3844615, 7689230, 9995999, 15378460, 19991998, 39983996, 49979995, 99959990, 199919980]

約数ペア:

[(1, 199919980), (2, 99959990), (4, 49979995), (5, 39983996), (10, 19991998), (13, 15378460), (20, 9995999), (26, 7689230), (52, 3844615), (65, 3075692), (130, 1537846), (260, 768923)]