20003120

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{4099}}^1$

素因数の和:4173

約数の個数: 40

約数和(自身を含む): 47281200

約数和(自身を除く): 27278080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4099, 4880, 8198, 16396, 20495, 32792, 40990, 65584, 81980, 163960, 250039, 327920, 500078, 1000156, 1250195, 2000312, 2500390, 4000624, 5000780, 10001560, 20003120]

約数ペア:

[(1, 20003120), (2, 10001560), (4, 5000780), (5, 4000624), (8, 2500390), (10, 2000312), (16, 1250195), (20, 1000156), (40, 500078), (61, 327920), (80, 250039), (122, 163960), (244, 81980), (305, 65584), (488, 40990), (610, 32792), (976, 20495), (1220, 16396), (2440, 8198), (4099, 4880)]