19977776

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{13721}}^1$

素因数の和:13749

約数の個数: 40

約数和(自身を含む): 47642784

約数和(自身を除く): 27665008

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 91, 104, 112, 182, 208, 364, 728, 1456, 13721, 27442, 54884, 96047, 109768, 178373, 192094, 219536, 356746, 384188, 713492, 768376, 1248611, 1426984, 1536752, 2497222, 2853968, 4994444, 9988888, 19977776]

約数ペア:

[(1, 19977776), (2, 9988888), (4, 4994444), (7, 2853968), (8, 2497222), (13, 1536752), (14, 1426984), (16, 1248611), (26, 768376), (28, 713492), (52, 384188), (56, 356746), (91, 219536), (104, 192094), (112, 178373), (182, 109768), (208, 96047), (364, 54884), (728, 27442), (1456, 13721)]