78991060

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{199}}^1\times {\mathrm{223}}^1$

素因数の和:520

約数の個数: 48

約数和(自身を含む): 169344000

約数和(自身を除く): 90352940

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 199, 223, 356, 398, 445, 446, 796, 890, 892, 995, 1115, 1780, 1990, 2230, 3980, 4460, 17711, 19847, 35422, 39694, 44377, 70844, 79388, 88555, 88754, 99235, 177110, 177508, 198470, 221885, 354220, 396940, 443770, 887540, 3949553, 7899106, 15798212, 19747765, 39495530, 78991060]

約数ペア:

[(1, 78991060), (2, 39495530), (4, 19747765), (5, 15798212), (10, 7899106), (20, 3949553), (89, 887540), (178, 443770), (199, 396940), (223, 354220), (356, 221885), (398, 198470), (445, 177508), (446, 177110), (796, 99235), (890, 88754), (892, 88555), (995, 79388), (1115, 70844), (1780, 44377), (1990, 39694), (2230, 35422), (3980, 19847), (4460, 17711)]