20989868

素因数分解:

$2^2\times {\mathrm{41}}^1\times {\mathrm{131}}^1\times {\mathrm{977}}^1$

素因数の和:1153

約数の個数: 24

約数和(自身を含む): 37954224

約数和(自身を除く): 16964356

約数列:

[1, 2, 4, 41, 82, 131, 164, 262, 524, 977, 1954, 3908, 5371, 10742, 21484, 40057, 80114, 127987, 160228, 255974, 511948, 5247467, 10494934, 20989868]

約数ペア:

[(1, 20989868), (2, 10494934), (4, 5247467), (41, 511948), (82, 255974), (131, 160228), (164, 127987), (262, 80114), (524, 40057), (977, 21484), (1954, 10742), (3908, 5371)]