12844400

素因数分解:

$2^4\times 5^2\times {\mathrm{163}}^1\times {\mathrm{197}}^1$

素因数の和:378

約数の個数: 60

約数和(自身を含む): 31205592

約数和(自身を除く): 18361192

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 163, 197, 200, 326, 394, 400, 652, 788, 815, 985, 1304, 1576, 1630, 1970, 2608, 3152, 3260, 3940, 4075, 4925, 6520, 7880, 8150, 9850, 13040, 15760, 16300, 19700, 32111, 32600, 39400, 64222, 65200, 78800, 128444, 160555, 256888, 321110, 513776, 642220, 802775, 1284440, 1605550, 2568880, 3211100, 6422200, 12844400]

約数ペア:

[(1, 12844400), (2, 6422200), (4, 3211100), (5, 2568880), (8, 1605550), (10, 1284440), (16, 802775), (20, 642220), (25, 513776), (40, 321110), (50, 256888), (80, 160555), (100, 128444), (163, 78800), (197, 65200), (200, 64222), (326, 39400), (394, 32600), (400, 32111), (652, 19700), (788, 16300), (815, 15760), (985, 13040), (1304, 9850), (1576, 8150), (1630, 7880), (1970, 6520), (2608, 4925), (3152, 4075), (3260, 3940)]