78048400

素因数分解:

$2^4\times 5^2\times {\mathrm{195121}}^1$

素因数の和:195139

約数の個数: 30

約数和(自身を含む): 187512242

約数和(自身を除く): 109463842

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 195121, 390242, 780484, 975605, 1560968, 1951210, 3121936, 3902420, 4878025, 7804840, 9756050, 15609680, 19512100, 39024200, 78048400]

約数ペア:

[(1, 78048400), (2, 39024200), (4, 19512100), (5, 15609680), (8, 9756050), (10, 7804840), (16, 4878025), (20, 3902420), (25, 3121936), (40, 1951210), (50, 1560968), (80, 975605), (100, 780484), (200, 390242), (400, 195121)]