15561680

素因数分解:

$2^4\times 5^1\times {\mathrm{194521}}^1$

素因数の和:194534

約数の個数: 20

約数和(自身を含む): 36181092

約数和(自身を除く): 20619412

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 194521, 389042, 778084, 972605, 1556168, 1945210, 3112336, 3890420, 7780840, 15561680]

約数ペア:

[(1, 15561680), (2, 7780840), (4, 3890420), (5, 3112336), (8, 1945210), (10, 1556168), (16, 972605), (20, 778084), (40, 389042), (80, 194521)]