78820400

素因数分解:

$2^4\times 5^2\times {\mathrm{101}}^1\times {\mathrm{1951}}^1$

素因数の和:2070

約数の個数: 60

約数和(自身を含む): 191338944

約数和(自身を除く): 112518544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 101, 200, 202, 400, 404, 505, 808, 1010, 1616, 1951, 2020, 2525, 3902, 4040, 5050, 7804, 8080, 9755, 10100, 15608, 19510, 20200, 31216, 39020, 40400, 48775, 78040, 97550, 156080, 195100, 197051, 390200, 394102, 780400, 788204, 985255, 1576408, 1970510, 3152816, 3941020, 4926275, 7882040, 9852550, 15764080, 19705100, 39410200, 78820400]

約数ペア:

[(1, 78820400), (2, 39410200), (4, 19705100), (5, 15764080), (8, 9852550), (10, 7882040), (16, 4926275), (20, 3941020), (25, 3152816), (40, 1970510), (50, 1576408), (80, 985255), (100, 788204), (101, 780400), (200, 394102), (202, 390200), (400, 197051), (404, 195100), (505, 156080), (808, 97550), (1010, 78040), (1616, 48775), (1951, 40400), (2020, 39020), (2525, 31216), (3902, 20200), (4040, 19510), (5050, 15608), (7804, 10100), (8080, 9755)]