399747560

素因数分解:

$2^3\times 5^1\times {\mathrm{823}}^1\times {\mathrm{12143}}^1$

素因数の和:12977

約数の個数: 32

約数和(自身を含む): 900599040

約数和(自身を除く): 500851480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 823, 1646, 3292, 4115, 6584, 8230, 12143, 16460, 24286, 32920, 48572, 60715, 97144, 121430, 242860, 485720, 9993689, 19987378, 39974756, 49968445, 79949512, 99936890, 199873780, 399747560]

約数ペア:

[(1, 399747560), (2, 199873780), (4, 99936890), (5, 79949512), (8, 49968445), (10, 39974756), (20, 19987378), (40, 9993689), (823, 485720), (1646, 242860), (3292, 121430), (4115, 97144), (6584, 60715), (8230, 48572), (12143, 32920), (16460, 24286)]