19820656

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{449}}^1$

素因数の和:577

約数の個数: 40

約数和(自身を含む): 40176000

約数和(自身を除く): 20355344

約数列:

[1, 2, 4, 8, 16, 31, 62, 89, 124, 178, 248, 356, 449, 496, 712, 898, 1424, 1796, 2759, 3592, 5518, 7184, 11036, 13919, 22072, 27838, 39961, 44144, 55676, 79922, 111352, 159844, 222704, 319688, 639376, 1238791, 2477582, 4955164, 9910328, 19820656]

約数ペア:

[(1, 19820656), (2, 9910328), (4, 4955164), (8, 2477582), (16, 1238791), (31, 639376), (62, 319688), (89, 222704), (124, 159844), (178, 111352), (248, 79922), (356, 55676), (449, 44144), (496, 39961), (712, 27838), (898, 22072), (1424, 13919), (1796, 11036), (2759, 7184), (3592, 5518)]