989900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{521}}^1$

素因数の和:554

約数の個数: 36

約数和(自身を含む): 2265480

約数和(自身を除く): 1275580

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 190, 380, 475, 521, 950, 1042, 1900, 2084, 2605, 5210, 9899, 10420, 13025, 19798, 26050, 39596, 49495, 52100, 98990, 197980, 247475, 494950, 989900]

約数ペア:

[(1, 989900), (2, 494950), (4, 247475), (5, 197980), (10, 98990), (19, 52100), (20, 49495), (25, 39596), (38, 26050), (50, 19798), (76, 13025), (95, 10420), (100, 9899), (190, 5210), (380, 2605), (475, 2084), (521, 1900), (950, 1042)]