209151980

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{79829}}^1$

素因数の和:79969

約数の個数: 24

約数和(自身を含む): 442577520

約数和(自身を除く): 233425540

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 79829, 159658, 319316, 399145, 798290, 1596580, 10457599, 20915198, 41830396, 52287995, 104575990, 209151980]

約数ペア:

[(1, 209151980), (2, 104575990), (4, 52287995), (5, 41830396), (10, 20915198), (20, 10457599), (131, 1596580), (262, 798290), (524, 399145), (655, 319316), (1310, 159658), (2620, 79829)]