81897130

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{397}}^1\times {\mathrm{421}}^1$

素因数の和:839

約数の個数: 48

約数和(自身を含む): 172322856

約数和(自身を除く): 90425726

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 397, 421, 490, 794, 842, 1985, 2105, 2779, 2947, 3970, 4210, 5558, 5894, 13895, 14735, 19453, 20629, 27790, 29470, 38906, 41258, 97265, 103145, 167137, 194530, 206290, 334274, 835685, 1169959, 1671370, 2339918, 5849795, 8189713, 11699590, 16379426, 40948565, 81897130]

約数ペア:

[(1, 81897130), (2, 40948565), (5, 16379426), (7, 11699590), (10, 8189713), (14, 5849795), (35, 2339918), (49, 1671370), (70, 1169959), (98, 835685), (245, 334274), (397, 206290), (421, 194530), (490, 167137), (794, 103145), (842, 97265), (1985, 41258), (2105, 38906), (2779, 29470), (2947, 27790), (3970, 20629), (4210, 19453), (5558, 14735), (5894, 13895)]