17890000

素因数分解:

$2^4\times 5^4\times {\mathrm{1789}}^1$

素因数の和:1817

約数の個数: 50

約数和(自身を含む): 43337690

約数和(自身を除く): 25447690

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 1789, 2000, 2500, 3578, 5000, 7156, 8945, 10000, 14312, 17890, 28624, 35780, 44725, 71560, 89450, 143120, 178900, 223625, 357800, 447250, 715600, 894500, 1118125, 1789000, 2236250, 3578000, 4472500, 8945000, 17890000]

約数ペア:

[(1, 17890000), (2, 8945000), (4, 4472500), (5, 3578000), (8, 2236250), (10, 1789000), (16, 1118125), (20, 894500), (25, 715600), (40, 447250), (50, 357800), (80, 223625), (100, 178900), (125, 143120), (200, 89450), (250, 71560), (400, 44725), (500, 35780), (625, 28624), (1000, 17890), (1250, 14312), (1789, 10000), (2000, 8945), (2500, 7156), (3578, 5000)]