20511980

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{7829}}^1$

素因数の和:7969

約数の個数: 24

約数和(自身を含む): 43409520

約数和(自身を除く): 22897540

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 7829, 15658, 31316, 39145, 78290, 156580, 1025599, 2051198, 4102396, 5127995, 10255990, 20511980]

約数ペア:

[(1, 20511980), (2, 10255990), (4, 5127995), (5, 4102396), (10, 2051198), (20, 1025599), (131, 156580), (262, 78290), (524, 39145), (655, 31316), (1310, 15658), (2620, 7829)]