20728520

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{22531}}^1$

素因数の和:22565

約数の個数: 32

約数和(自身を含む): 48669120

約数和(自身を除く): 27940600

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 184, 230, 460, 920, 22531, 45062, 90124, 112655, 180248, 225310, 450620, 518213, 901240, 1036426, 2072852, 2591065, 4145704, 5182130, 10364260, 20728520]

約数ペア:

[(1, 20728520), (2, 10364260), (4, 5182130), (5, 4145704), (8, 2591065), (10, 2072852), (20, 1036426), (23, 901240), (40, 518213), (46, 450620), (92, 225310), (115, 180248), (184, 112655), (230, 90124), (460, 45062), (920, 22531)]