20638496

素因数分解:

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

素因数の和:277

約数の個数: 48

約数和(自身を含む): 42106680

約数和(自身を除く): 21468184

約数列:

[1, 2, 4, 8, 16, 32, 61, 97, 109, 122, 194, 218, 244, 388, 436, 488, 776, 872, 976, 1552, 1744, 1952, 3104, 3488, 5917, 6649, 10573, 11834, 13298, 21146, 23668, 26596, 42292, 47336, 53192, 84584, 94672, 106384, 169168, 189344, 212768, 338336, 644953, 1289906, 2579812, 5159624, 10319248, 20638496]

約数ペア:

[(1, 20638496), (2, 10319248), (4, 5159624), (8, 2579812), (16, 1289906), (32, 644953), (61, 338336), (97, 212768), (109, 189344), (122, 169168), (194, 106384), (218, 94672), (244, 84584), (388, 53192), (436, 47336), (488, 42292), (776, 26596), (872, 23668), (976, 21146), (1552, 13298), (1744, 11834), (1952, 10573), (3104, 6649), (3488, 5917)]