21199120

素因数分解:

$2^4\times 5^1\times {\mathrm{193}}^1\times {\mathrm{1373}}^1$

素因数の和:1579

約数の個数: 40

約数和(自身を含む): 49579416

約数和(自身を除く): 28380296

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 193, 386, 772, 965, 1373, 1544, 1930, 2746, 3088, 3860, 5492, 6865, 7720, 10984, 13730, 15440, 21968, 27460, 54920, 109840, 264989, 529978, 1059956, 1324945, 2119912, 2649890, 4239824, 5299780, 10599560, 21199120]

約数ペア:

[(1, 21199120), (2, 10599560), (4, 5299780), (5, 4239824), (8, 2649890), (10, 2119912), (16, 1324945), (20, 1059956), (40, 529978), (80, 264989), (193, 109840), (386, 54920), (772, 27460), (965, 21968), (1373, 15440), (1544, 13730), (1930, 10984), (2746, 7720), (3088, 6865), (3860, 5492)]