208768520

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{13417}}^1$

素因数の和:13817

約数の個数: 32

約数和(自身を含む): 470971800

約数和(自身を除く): 262203280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1556, 1945, 3112, 3890, 7780, 13417, 15560, 26834, 53668, 67085, 107336, 134170, 268340, 536680, 5219213, 10438426, 20876852, 26096065, 41753704, 52192130, 104384260, 208768520]

約数ペア:

[(1, 208768520), (2, 104384260), (4, 52192130), (5, 41753704), (8, 26096065), (10, 20876852), (20, 10438426), (40, 5219213), (389, 536680), (778, 268340), (1556, 134170), (1945, 107336), (3112, 67085), (3890, 53668), (7780, 26834), (13417, 15560)]