78316400

素因数分解:

$2^4\times 5^2\times {\mathrm{195791}}^1$

素因数の和:195809

約数の個数: 30

約数和(自身を含む): 188156112

約数和(自身を除く): 109839712

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 195791, 391582, 783164, 978955, 1566328, 1957910, 3132656, 3915820, 4894775, 7831640, 9789550, 15663280, 19579100, 39158200, 78316400]

約数ペア:

[(1, 78316400), (2, 39158200), (4, 19579100), (5, 15663280), (8, 9789550), (10, 7831640), (16, 4894775), (20, 3915820), (25, 3132656), (40, 1957910), (50, 1566328), (80, 978955), (100, 783164), (200, 391582), (400, 195791)]