20386688

素因数分解:

$2^7\times 7^1\times {\mathrm{61}}^1\times {\mathrm{373}}^1$

素因数の和:455

約数の個数: 64

約数和(自身を含む): 47303520

約数和(自身を除く): 26916832

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 61, 64, 112, 122, 128, 224, 244, 373, 427, 448, 488, 746, 854, 896, 976, 1492, 1708, 1952, 2611, 2984, 3416, 3904, 5222, 5968, 6832, 7808, 10444, 11936, 13664, 20888, 22753, 23872, 27328, 41776, 45506, 47744, 54656, 83552, 91012, 159271, 167104, 182024, 318542, 334208, 364048, 637084, 728096, 1274168, 1456192, 2548336, 2912384, 5096672, 10193344, 20386688]

約数ペア:

[(1, 20386688), (2, 10193344), (4, 5096672), (7, 2912384), (8, 2548336), (14, 1456192), (16, 1274168), (28, 728096), (32, 637084), (56, 364048), (61, 334208), (64, 318542), (112, 182024), (122, 167104), (128, 159271), (224, 91012), (244, 83552), (373, 54656), (427, 47744), (448, 45506), (488, 41776), (746, 27328), (854, 23872), (896, 22753), (976, 20888), (1492, 13664), (1708, 11936), (1952, 10444), (2611, 7808), (2984, 6832), (3416, 5968), (3904, 5222)]