28945520

素因数分解:

$2^4\times 5^1\times {\mathrm{181}}^1\times {\mathrm{1999}}^1$

素因数の和:2193

約数の個数: 40

約数和(自身を含む): 67704000

約数和(自身を除く): 38758480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 181, 362, 724, 905, 1448, 1810, 1999, 2896, 3620, 3998, 7240, 7996, 9995, 14480, 15992, 19990, 31984, 39980, 79960, 159920, 361819, 723638, 1447276, 1809095, 2894552, 3618190, 5789104, 7236380, 14472760, 28945520]

約数ペア:

[(1, 28945520), (2, 14472760), (4, 7236380), (5, 5789104), (8, 3618190), (10, 2894552), (16, 1809095), (20, 1447276), (40, 723638), (80, 361819), (181, 159920), (362, 79960), (724, 39980), (905, 31984), (1448, 19990), (1810, 15992), (1999, 14480), (2896, 9995), (3620, 7996), (3998, 7240)]