20581072

素因数分解:

$2^4\times {\mathrm{89}}^1\times {\mathrm{97}}^1\times {\mathrm{149}}^1$

素因数の和:343

約数の個数: 40

約数和(自身を含む): 41013000

約数和(自身を除く): 20431928

約数列:

[1, 2, 4, 8, 16, 89, 97, 149, 178, 194, 298, 356, 388, 596, 712, 776, 1192, 1424, 1552, 2384, 8633, 13261, 14453, 17266, 26522, 28906, 34532, 53044, 57812, 69064, 106088, 115624, 138128, 212176, 231248, 1286317, 2572634, 5145268, 10290536, 20581072]

約数ペア:

[(1, 20581072), (2, 10290536), (4, 5145268), (8, 2572634), (16, 1286317), (89, 231248), (97, 212176), (149, 138128), (178, 115624), (194, 106088), (298, 69064), (356, 57812), (388, 53044), (596, 34532), (712, 28906), (776, 26522), (1192, 17266), (1424, 14453), (1552, 13261), (2384, 8633)]