25798120

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1$

素因数の和:278

約数の個数: 64

約数和(自身を含む): 60152400

約数和(自身を除く): 34354280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 97, 109, 122, 194, 218, 244, 305, 388, 436, 485, 488, 545, 610, 776, 872, 970, 1090, 1220, 1940, 2180, 2440, 3880, 4360, 5917, 6649, 10573, 11834, 13298, 21146, 23668, 26596, 29585, 33245, 42292, 47336, 52865, 53192, 59170, 66490, 84584, 105730, 118340, 132980, 211460, 236680, 265960, 422920, 644953, 1289906, 2579812, 3224765, 5159624, 6449530, 12899060, 25798120]

約数ペア:

[(1, 25798120), (2, 12899060), (4, 6449530), (5, 5159624), (8, 3224765), (10, 2579812), (20, 1289906), (40, 644953), (61, 422920), (97, 265960), (109, 236680), (122, 211460), (194, 132980), (218, 118340), (244, 105730), (305, 84584), (388, 66490), (436, 59170), (485, 53192), (488, 52865), (545, 47336), (610, 42292), (776, 33245), (872, 29585), (970, 26596), (1090, 23668), (1220, 21146), (1940, 13298), (2180, 11834), (2440, 10573), (3880, 6649), (4360, 5917)]