7900400

素因数分解:

$2^4\times 5^2\times {\mathrm{19751}}^1$

素因数の和:19769

約数の個数: 30

約数和(自身を含む): 18981672

約数和(自身を除く): 11081272

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 19751, 39502, 79004, 98755, 158008, 197510, 316016, 395020, 493775, 790040, 987550, 1580080, 1975100, 3950200, 7900400]

約数ペア:

[(1, 7900400), (2, 3950200), (4, 1975100), (5, 1580080), (8, 987550), (10, 790040), (16, 493775), (20, 395020), (25, 316016), (40, 197510), (50, 158008), (80, 98755), (100, 79004), (200, 39502), (400, 19751)]