7121780

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{4001}}^1$

素因数の和:4099

約数の個数: 24

約数和(自身を含む): 15127560

約数和(自身を除く): 8005780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 4001, 8002, 16004, 20005, 40010, 80020, 356089, 712178, 1424356, 1780445, 3560890, 7121780]

約数ペア:

[(1, 7121780), (2, 3560890), (4, 1780445), (5, 1424356), (10, 712178), (20, 356089), (89, 80020), (178, 40010), (356, 20005), (445, 16004), (890, 8002), (1780, 4001)]