25726340

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1\times {\mathrm{149}}^1$

素因数の和:344

約数の個数: 48

約数和(自身を含む): 55566000

約数和(自身を除く): 29839660

約数列:

[1, 2, 4, 5, 10, 20, 89, 97, 149, 178, 194, 298, 356, 388, 445, 485, 596, 745, 890, 970, 1490, 1780, 1940, 2980, 8633, 13261, 14453, 17266, 26522, 28906, 34532, 43165, 53044, 57812, 66305, 72265, 86330, 132610, 144530, 172660, 265220, 289060, 1286317, 2572634, 5145268, 6431585, 12863170, 25726340]

約数ペア:

[(1, 25726340), (2, 12863170), (4, 6431585), (5, 5145268), (10, 2572634), (20, 1286317), (89, 289060), (97, 265220), (149, 172660), (178, 144530), (194, 132610), (298, 86330), (356, 72265), (388, 66305), (445, 57812), (485, 53044), (596, 43165), (745, 34532), (890, 28906), (970, 26522), (1490, 17266), (1780, 14453), (1940, 13261), (2980, 8633)]