20591120

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23399}}^1$

素因数の和:23423

約数の個数: 40

約数和(自身を含む): 52228800

約数和(自身を除く): 31637680

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 23399, 46798, 93596, 116995, 187192, 233990, 257389, 374384, 467980, 514778, 935960, 1029556, 1286945, 1871920, 2059112, 2573890, 4118224, 5147780, 10295560, 20591120]

約数ペア:

[(1, 20591120), (2, 10295560), (4, 5147780), (5, 4118224), (8, 2573890), (10, 2059112), (11, 1871920), (16, 1286945), (20, 1029556), (22, 935960), (40, 514778), (44, 467980), (55, 374384), (80, 257389), (88, 233990), (110, 187192), (176, 116995), (220, 93596), (440, 46798), (880, 23399)]