521380

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{199}}^1$

素因数の和:339

約数の個数: 24

約数和(自身を含む): 1108800

約数和(自身を除く): 587420

約数列:

[1, 2, 4, 5, 10, 20, 131, 199, 262, 398, 524, 655, 796, 995, 1310, 1990, 2620, 3980, 26069, 52138, 104276, 130345, 260690, 521380]

約数ペア:

[(1, 521380), (2, 260690), (4, 130345), (5, 104276), (10, 52138), (20, 26069), (131, 3980), (199, 2620), (262, 1990), (398, 1310), (524, 995), (655, 796)]